2.2.0.25truefalse010002 - Document - Risk/Return Summary - Columbia Strategic Allocation Fund (Class A, B, C, I, R and R4 Shares) {Unlabeled}falsefalsetrue1falsefalseUSDtruefalse{dei_DocumentInformationDocumentAxis} : Columbia Strategic Allocation Fund {dei_LegalEntityAxis} : Class A, B, C, I, R and R4 Shares 2/19/2010 - 2/18/2011 USD ($) $TwelveMonthsEnded_18Feb2011_S000031367_Member_Prospectus_Three_Memberhttp://www.sec.gov/CIK0001352280duration2010-02-19T00:00:002011-02-18T00:00:00falsefalsecfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalsecfst1352280_ProspectusThreeMemberdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$1false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://columbiamanagement.com/role/riskreturnsummarycolumbiastrategicallocationfundclassabcirandr4shares1falsefalsefalse00Columbia Strategic Allocation Fund | Class A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund | Class A, B, C, I, R and R4 Sharesfalsefalsefalsefalsefalse1falsefalseUSDtruefalse{dei_DocumentInformationDocumentAxis} : Columbia Strategic Allocation Fund {dei_LegalEntityAxis} : Class A, B, C, I, R and R4 Shares 2/19/2010 - 2/18/2011 USD ($) $TwelveMonthsEnded_18Feb2011_S000031367_Member_Prospectus_Three_Memberhttp://www.sec.gov/CIK0001352280duration2010-02-19T00:00:002011-02-18T00:00:00falsefalsecfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalsecfst1352280_ProspectusThreeMemberdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseColumbia Strategic Allocation Fund | Class A, B, C, I, R and R4 Shares3false0rr_RiskReturnHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Summary of the FundfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Investment Objectives/Goals Include the following information, in plain English under rule 421(d) under the Securities Act, in the order and subject matter indicatedReference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 falsefalseRisk/Return [Heading]4false0rr_ObjectiveHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00INVESTMENT OBJECTIVEfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalseObjective [Heading]5false0rr_ObjectivePrimaryTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Columbia Strategic Allocation Fund (the Fund) seeks to provide shareholders maximum total return through a combination of growth of capital and current income.falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalseObjective, Primary [Text Block]6false0rr_ExpenseHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00FEES AND EXPENSES OF THE FUNDfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Fee Table Includes the following information, in plain English under rule 421(d) under the Securities Act, after Item 2 Fees and expenses of the Fund This table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Shareholder Fees (fees paid directly from your investment) Example This 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 assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be You would pay the following expenses if you did not redeem your shares The Example does not reflect sales charges (loads) on reinvested dividends [and other distributions]. If these sales charges (loads) were included, your costs would be higher. Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs. 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 __% of the average value of its whole portfolio. Instructions. A.3.instructions.6 New Funds. For purposes of this Item, a "New Fund" is a Fund that does not include in Form N-1A financial statements reporting operating results or that includes financial statements for the Fund's initial fiscal year reporting operating results for a period of 6 months or less. The following Instructions apply to New Funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph d -Subsection instructions falsefalseExpense [Heading]7false0rr_ExpenseNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts on Class A shares of the Fund if you and members of your immediate family (that share the same mailing address), agree to invest in the future, at least $50,000 in any of the Columbia, Columbia Acorn or RiverSource funds (including the Seligman and Threadneedle branded funds) (the Fund Family). More information about these and other discounts is available from your financial intermediary and under &#8220;Reductions/Waivers of Sales Charges &#8212; Front-End Sales Charge Reductions&#8221; on page S.23 of this prospectus and on page D.1 of Appendix D in the Fund&#8217;s Statement of Additional Information (SAI).falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Include the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown.The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount. Modify the narrative explanation to state that Fund shares are sold on a national securities exchange at the end of the time periods indicated, and that brokerage commissions for buying and selling Fund shares through a broker are not reflected.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalseExpense Narrative [Text Block]8false0rr_ShareholderFeesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Shareholder Fees (fees paid directly from your investment)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringShareholder Fees (fees paid directly from your investment).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subsection table falsefalseShareholder Fees Caption [Text]9false0rr_ShareholderFeesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> &lt;div style="display:none;"&gt;~ http://columbiamanagement.com/role/ShareholderFeesColumbiaStrategicAllocationFundClassABCIRAndR4Shares column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_DocumentInformationDocumentAxis compact cfst1352280_S000031367_Member * row dei_LegalEntityAxis compact cfst1352280_Prospectus_Three_Member * ~&lt;/div&gt; </div>falsefalse<div> &lt;div style="display:none;"&gt;~ http://columbiamanagement.com/role/ShareholderFeesColumbiaStrategicAllocationFundClassABCIRAndR4Shares column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_DocumentInformationDocumentAxis compact cfst1352280_S000031367_Member * row dei_LegalEntityAxis compact cfst1352280_Prospectus_Three_Member * ~&lt;/div&gt; </div>falsehttp://columbiamanagement.com/role/ShareholderFeesColumbiaStrategicAllocationFundClassABCIRAndR4Sharesfalsefalse0200103 - Schedule - Shareholder Fees - Columbia Strategic Allocation Fund (Class A, B, C, I, R and R4 Shares)truefalsefalse1falseColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097525Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation FundClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class AUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Brr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097526Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation FundClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class BUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$3falseColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097527Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation FundClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class CUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$4falseColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097528Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation FundClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class IUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$5falseColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Rrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097529Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation FundClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class RUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$6falseColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class R4rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097530Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation FundClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class R4USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*4false0rr_ShareholderFeesColumnNamerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Class Afalsefalsefalsetruefalse2falsefalsefalse00Class Bfalsefalsefalsetruefalse3falsefalsefalse00Class Cfalsefalsefalsetruefalse4falsefalsefalse00Class Ifalsefalsefalsetruefalse5falsefalsefalse00Class Rfalsefalsefalsetruefalse6falsefalsefalse00Class R4falsefalsefalsetruefalseOtherus-types:textBlockItemTypestringShareholder Fees (fees paid directly from your investment).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subsection table falsefalseShareholder Fees Column [Text]0rr_ShareholderFeesColumnNametruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Class AClass Afalsefalsefalsetruefalse2falsefalsefalse00Class BClass Bfalsefalsefalsetruefalse3falsefalsefalse00Class CClass Cfalsefalsefalsetruefalse4falsefalsefalse00Class IClass Ifalsefalsefalsetruefalse5falsefalsefalse00Class RClass Rfalsefalsefalsetruefalse6falsefalsefalse00Class R4Class R4falsefalsefalsetruefalseOthernanafalsefalseShareholder Fees Column [Text]2falseRowprimaryElement*5false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruetrue0.05750.0575falsefalsefalsetruefalse2truetruetrue0.00000.0000falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalse5truetruetrue0.00000.0000falsefalsefalsetruefalse6truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalseMaximum sales charge (load) imposed on purchases (as a percentage of offering price)0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05750.0575falsefalsefalsetruefalse2truetruetrue0.00000.0000falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalse5truetruetrue0.00000.0000falsefalsefalsetruefalse6truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalseMaximum sales charge (load) imposed on purchases (as a percentage of offering price)3falseRowprimaryElement*6false0rr_MaximumDeferredSalesChargeOverOtherrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruetrue0.01000.0100falsefalsefalsetruefalse2truetruetrue0.05000.0500falsefalsefalsetruefalse3truetruetrue0.01000.0100falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalse5truetruetrue0.00000.0000falsefalsefalsetruefalse6truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalseMaximum deferred sales charge (load) imposed on redemptions (as a percentage of offering price at the time of purchase, or current net asset value, whichever is less)0rr_MaximumDeferredSalesChargeOverOthertruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01000.0100falsefalsefalsetruefalse2truetruetrue0.05000.0500falsefalsefalsetruefalse3truetruetrue0.01000.0100falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalse5truetruetrue0.00000.0000falsefalsefalsetruefalse6truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalseMaximum deferred sales charge (load) imposed on redemptions (as a percentage of offering price at the time of purchase, or current net asset value, whichever is less)63Shareholder Fees - Columbia Strategic Allocation Fund (Class A, B, C, I, R and R4 Shares) Columbia Strategic Allocation Fund Class A, B, C, I, R and R4 SharesUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ShareholderFeesData.No authoritative reference available.falsefalseShareholder Fees [Table]10false0rr_AnnualFundOperatingExpensesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> &lt;div style="display:none;"&gt;~ http://columbiamanagement.com/role/AnnualFundOperatingExpensesColumbiaStrategicAllocationFundClassABCIRAndR4Shares column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_DocumentInformationDocumentAxis compact cfst1352280_S000031367_Member * row dei_LegalEntityAxis compact cfst1352280_Prospectus_Three_Member * ~&lt;/div&gt; </div>falsefalse<div> &lt;div style="display:none;"&gt;~ http://columbiamanagement.com/role/AnnualFundOperatingExpensesColumbiaStrategicAllocationFundClassABCIRAndR4Shares column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_DocumentInformationDocumentAxis compact cfst1352280_S000031367_Member * row dei_LegalEntityAxis compact cfst1352280_Prospectus_Three_Member * ~&lt;/div&gt; </div>falsehttp://columbiamanagement.com/role/AnnualFundOperatingExpensesColumbiaStrategicAllocationFundClassABCIRAndR4Sharesfalsefalse0200203 - Schedule - Annual Fund Operating Expenses - Columbia Strategic Allocation Fund (Class A, B, C, I, R and R4 Shares)truefalsefalse1falseColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation FundClass A, B, C, I, R and R4 SharesShare ClassesUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097525Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation FundClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class AUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$3falseColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Brr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097526Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation FundClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class BUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$4falseColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097527Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation FundClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class CUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$5falseColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097528Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation FundClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class IUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$6falseColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Rrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097529Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation FundClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class RUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$7falseColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class R4rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097530Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation FundClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class R4USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*4false0rr_OperatingExpensesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)[2]falsefalsefalsetruefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 7 -Subsection table falsefalseOperating Expenses Caption [Text]0rr_OperatingExpensesCaptiontruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[1]1falsefalsefalse00Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)falsefalsefalsetruefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7falsefalsefalse00falsefalsefalsefalsefalseOthernanafalsefalseOperating Expenses Caption [Text]2falseRowprimaryElement*5false0rr_OperatingExpensesColumnNamerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsetruefalse2falsefalsefalse00Class Afalsefalsefalsetruefalse3falsefalsefalse00Class Bfalsefalsefalsetruefalse4falsefalsefalse00Class Cfalsefalsefalsetruefalse5falsefalsefalse00Class Ifalsefalsefalsetruefalse6falsefalsefalse00Class Rfalsefalsefalsetruefalse7falsefalsefalse00Class R4falsefalsefalsetruefalseOtherus-types:textBlockItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 7 -Subsection table falsefalseOperating Expenses Column [Text]0rr_OperatingExpensesColumnNametruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00Class AClass Afalsefalsefalsetruefalse3falsefalsefalse00Class BClass Bfalsefalsefalsetruefalse4falsefalsefalse00Class CClass Cfalsefalsefalsetruefalse5falsefalsefalse00Class IClass Ifalsefalsefalsetruefalse6falsefalsefalse00Class RClass Rfalsefalsefalsetruefalse7falsefalsefalse00Class R4Class R4falsefalsefalsetruefalseOthernanafalsefalseOperating Expenses Column [Text]3falseRowprimaryElement*6false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsetruetrue00falsefalsefalsetruefalse2truetruetrue0.00490.0049[1]falsefalsefalsetruefalse3truetruetrue0.00490.0049[1]falsefalsefalsetruefalse4truetruetrue0.00490.0049[1]falsefalsefalsetruefalse5truetruetrue0.00490.0049[1]falsefalsefalsetruefalse6truetruetrue0.00490.0049[1]falsefalsefalsetruefalse7truetruetrue0.00490.0049[1]falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalseManagement fees0rr_ManagementFeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[2]1falsefalsefalse00falsefalsefalsefalsefalse2truetruetrue0.00490.0049falsefalsefalsetruefalse3truetruetrue0.00490.0049falsefalsefalsetruefalse4truetruetrue0.00490.0049falsefalsefalsetruefalse5truetruetrue0.00490.0049falsefalsefalsetruefalse6truetruetrue0.00490.0049falsefalsefalsetruefalse7truetruetrue0.00490.0049falsefalsefalsetruefalseOthernanafalsefalseManagement fees4falseRowprimaryElement*7false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsetruetrue00falsefalsefalsetruefalse2truetruetrue0.00250.0025falsefalsefalsetruefalse3truetruetrue0.01000.0100falsefalsefalsetruefalse4truetruetrue0.01000.0100falsefalsefalsetruefalse5truetruetrue0.00000.0000falsefalsefalsetruefalse6truetruetrue0.00500.0050falsefalsefalsetruefalse7truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalseDistribution and/or service (12b-1) fees0rr_DistributionAndService12b1FeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2truetruetrue0.00250.0025falsefalsefalsetruefalse3truetruetrue0.01000.0100falsefalsefalsetruefalse4truetruetrue0.01000.0100falsefalsefalsetruefalse5truetruetrue0.00000.0000falsefalsefalsetruefalse6truetruetrue0.00500.0050falsefalsefalsetruefalse7truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalseDistribution and/or service (12b-1) fees5falseRowprimaryElement*8false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsetruetrue00falsefalsefalsetruefalse2truetruetrue0.00320.0032falsefalsefalsetruefalse3truetruetrue0.00320.0032falsefalsefalsetruefalse4truetruetrue0.00320.0032falsefalsefalsetruefalse5truetruetrue0.00130.0013falsefalsefalsetruefalse6truetruetrue0.00320.0032falsefalsefalsetruefalse7truetruetrue0.00430.0043falsefalsefalsetruefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalseOther expenses0rr_OtherExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2truetruetrue0.00320.0032falsefalsefalsetruefalse3truetruetrue0.00320.0032falsefalsefalsetruefalse4truetruetrue0.00320.0032falsefalsefalsetruefalse5truetruetrue0.00130.0013falsefalsefalsetruefalse6truetruetrue0.00320.0032falsefalsefalsetruefalse7truetruetrue0.00430.0043falsefalsefalsetruefalseOthernanafalsefalseOther expenses6falseRowprimaryElement*9false0rr_AcquiredFundFeesAndExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruetrue00falsefalsefalsetruefalse2truetruetrue0.00010.0001falsefalsefalsetruefalse3truetruetrue0.00010.0001falsefalsefalsetruefalse4truetruetrue0.00010.0001falsefalsefalsetruefalse5truetruetrue0.00010.0001falsefalsefalsetruefalse6truetruetrue0.00010.0001falsefalsefalsetruefalse7truetruetrue0.00010.0001falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalseAcquired Fund Fees and Expenses0rr_AcquiredFundFeesAndExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2truetruetrue0.00010.0001falsefalsefalsetruefalse3truetruetrue0.00010.0001falsefalsefalsetruefalse4truetruetrue0.00010.0001falsefalsefalsetruefalse5truetruetrue0.00010.0001falsefalsefalsetruefalse6truetruetrue0.00010.0001falsefalsefalsetruefalse7truetruetrue0.00010.0001falsefalsefalsetruefalseOthernanafalsefalseAcquired Fund Fees and Expenses7falseRowprimaryElement*10false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsetruetrue00falsefalsefalsetruefalse2truetruetrue0.01070.0107falsefalsefalsetruefalse3truetruetrue0.01820.0182falsefalsefalsetruefalse4truetruetrue0.01820.0182falsefalsefalsetruefalse5truetruetrue0.00630.0063falsefalsefalsetruefalse6truetruetrue0.01320.0132falsefalsefalsetruefalse7truetruetrue0.00930.0093falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalseTotal annual fund operating expenses0rr_ExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2truetruetrue0.01070.0107falsefalsefalsetruefalse3truetruetrue0.01820.0182falsefalsefalsetruefalse4truetruetrue0.01820.0182falsefalsefalsetruefalse5truetruetrue0.00630.0063falsefalsefalsetruefalse6truetruetrue0.01320.0132falsefalsefalsetruefalse7truetruetrue0.00930.0093falsefalsefalsetruefalseOthernanafalsefalseTotal annual fund operating expenses1The expense ratios have been adjusted to reflect current fees. 2In September 2010, the Fund's Board approved an amended investment management services agreement which, if approved by Fund shareholders at a meeting expected to be held in the first half of 2011, would have the effect of changing the effective management fee rate of the Fund. 77Annual Fund Operating Expenses - Columbia Strategic Allocation Fund (Class A, B, C, I, R and R4 Shares) Columbia Strategic Allocation FundUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to OperatingExpensesData.No authoritative reference available.falsefalseAnnual Fund Operating Expenses [Table]11false0rr_ExpenseExampleHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00ExamplefalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringHeading for Expense Example.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalseExpense Example [Heading]12false0rr_ExpenseExampleNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00The 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 assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem your shares at the end of those periods (unless otherwise noted). The Example also assumes that your investment has a 5% return each year and that the Fund&#8217;s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThe Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection example falsefalseExpense Example Narrative [Text Block]13false0rr_ExpenseExampleWithRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> &lt;div style="display:none;"&gt;~ http://columbiamanagement.com/role/ExpenseExampleColumbiaStrategicAllocationFundClassABCIRAndR4Shares column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_DocumentInformationDocumentAxis compact cfst1352280_S000031367_Member * row dei_LegalEntityAxis compact cfst1352280_Prospectus_Three_Member * ~&lt;/div&gt; </div>falsefalse<div> &lt;div style="display:none;"&gt;~ http://columbiamanagement.com/role/ExpenseExampleColumbiaStrategicAllocationFundClassABCIRAndR4Shares column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_DocumentInformationDocumentAxis compact cfst1352280_S000031367_Member * row dei_LegalEntityAxis compact cfst1352280_Prospectus_Three_Member * ~&lt;/div&gt; </div>truehttp://columbiamanagement.com/role/ExpenseExampleColumbiaStrategicAllocationFundClassABCIRAndR4Sharesfalsefalse0200303 - Schedule - Expense Example - Columbia Strategic Allocation Fund (Class A, B, C, I, R and R4 Shares) {Transposed}truefalsefalse1falseColumnprimaryElement*4false0rr_ExpenseExampleByYearColumnNamerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Class A (whether or not shares are redeemed)falsefalsefalsetruefalse2falsefalsefalse00Class B (if shares are redeemed)falsefalsefalsetruefalse3falsefalsefalse00Class C (if shares are redeemed)falsefalsefalsetruefalse4falsefalsefalse00Class I (whether or not shares are redeemed)falsefalsefalsetruefalse5falsefalsefalse00Class R (whether or not shares are redeemed)falsefalsefalsetruefalse6falsefalsefalse00Class R4 (whether or not shares are redeemed)falsefalsefalsetruefalseOtherus-types:textBlockItemTypestringThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalseExpense Example, By Year, Column [Text]falseUSDfalsefalse$2falseColumnprimaryElement*5false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsetrue678678falsefalsefalsetruefalse2truefalsetrue685685falsefalsefalsetruefalse3truefalsetrue285285falsefalsefalsetruefalse4truefalsetrue6464falsefalsefalsetruefalse5truefalsetrue134134falsefalsefalsetruefalse6truefalsetrue9595falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse1 yearfalseUSDfalsefalse$3falseColumnprimaryElement*6false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsetrue896896falsefalsefalsetruefalse2truefalsetrue873873falsefalsefalsetruefalse3truefalsetrue573573falsefalsefalsetruefalse4truefalsetrue202202falsefalsefalsetruefalse5truefalsetrue419419falsefalsefalsetruefalse6truefalsetrue297297falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse3 yearsfalseUSDfalsefalse$4falseColumnprimaryElement*7false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsetrue11321132falsefalsefalsetruefalse2truefalsetrue11861186falsefalsefalsetruefalse3truefalsetrue986986falsefalsefalsetruefalse4truefalsetrue352352falsefalsefalsetruefalse5truefalsetrue724724falsefalsefalsetruefalse6truefalsetrue516516falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse5 yearsfalseUSDfalsefalse$5falseColumnprimaryElement*8false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsetrue18101810falsefalsefalsetruefalse2truefalsetrue19451945falsefalsefalsetruefalse3truefalsetrue21422142falsefalsefalsetruefalse4truefalsetrue790790falsefalsefalsetruefalse5truefalsetrue15951595falsefalsefalsetruefalse6truefalsetrue11471147falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse10 yearsfalseUSDfalsefalse$1falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097525Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation FundClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class AUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Class A (whether or not shares are redeemed)Class A (whether or not shares are redeemed)falsefalsefalsetruefalse2truefalsetrue678678falsefalsefalsetruefalse3truefalsetrue896896falsefalsefalsetruefalse4truefalsetrue11321132falsefalsefalsetruefalse5truefalsetrue18101810falsefalsefalsetruefalseOthernanafalsefalseColumbia Strategic Allocation Fund - Class A2falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Brr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097526Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation FundClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class BUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Class B (if shares are redeemed)Class B (if shares are redeemed)falsefalsefalsetruefalse2truefalsetrue685685falsefalsefalsetruefalse3truefalsetrue873873falsefalsefalsetruefalse4truefalsetrue11861186falsefalsefalsetruefalse5truefalsetrue19451945falsefalsefalsetruefalseOthernanafalsefalseColumbia Strategic Allocation Fund - Class B3falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097527Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation FundClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class CUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Class C (if shares are redeemed)Class C (if shares are redeemed)falsefalsefalsetruefalse2truefalsetrue285285falsefalsefalsetruefalse3truefalsetrue573573falsefalsefalsetruefalse4truefalsetrue986986falsefalsefalsetruefalse5truefalsetrue21422142falsefalsefalsetruefalseOthernanafalsefalseColumbia Strategic Allocation Fund - Class C4falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097528Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation FundClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class IUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Class I (whether or not shares are redeemed)Class I (whether or not shares are redeemed)falsefalsefalsetruefalse2truefalsetrue6464falsefalsefalsetruefalse3truefalsetrue202202falsefalsefalsetruefalse4truefalsetrue352352falsefalsefalsetruefalse5truefalsetrue790790falsefalsefalsetruefalseOthernanafalsefalseColumbia Strategic Allocation Fund - Class I5falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Rrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097529Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation FundClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class RUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Class R (whether or not shares are redeemed)Class R (whether or not shares are redeemed)falsefalsefalsetruefalse2truefalsetrue134134falsefalsefalsetruefalse3truefalsetrue419419falsefalsefalsetruefalse4truefalsetrue724724falsefalsefalsetruefalse5truefalsetrue15951595falsefalsefalsetruefalseOthernanafalsefalseColumbia Strategic Allocation Fund - Class R6falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class R4rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097530Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation FundClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class R4USDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Class R4 (whether or not shares are redeemed)Class R4 (whether or not shares are redeemed)falsefalsefalsetruefalse2truefalsetrue9595falsefalsefalsetruefalse3truefalsetrue297297falsefalsefalsetruefalse4truefalsetrue516516falsefalsefalsetruefalse5truefalsetrue11471147falsefalsefalsetruefalseOthernanafalsefalseColumbia Strategic Allocation Fund - Class R456Expense Example - Columbia Strategic Allocation Fund (Class A, B, C, I, R and R4 Shares) Columbia Strategic Allocation Fund Class A, B, C, I, R and R4 Shares (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ExpenseExample.No authoritative reference available.falsefalseExpense Example, With Redemption [Table]14false0rr_ExpenseExampleNoRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> &lt;div style="display:none;"&gt;~ http://columbiamanagement.com/role/ExpenseExampleNoRedemptionColumbiaStrategicAllocationFundClassABCIRAndR4Shares column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_DocumentInformationDocumentAxis compact cfst1352280_S000031367_Member * row dei_LegalEntityAxis compact cfst1352280_Prospectus_Three_Member * ~&lt;/div&gt; </div>falsefalse<div> &lt;div style="display:none;"&gt;~ http://columbiamanagement.com/role/ExpenseExampleNoRedemptionColumbiaStrategicAllocationFundClassABCIRAndR4Shares column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_DocumentInformationDocumentAxis compact cfst1352280_S000031367_Member * row dei_LegalEntityAxis compact cfst1352280_Prospectus_Three_Member * ~&lt;/div&gt; </div>truehttp://columbiamanagement.com/role/ExpenseExampleNoRedemptionColumbiaStrategicAllocationFundClassABCIRAndR4Sharesfalsefalse0200403 - Schedule - Expense Example, No Redemption - Columbia Strategic Allocation Fund (Class A, B, C, I, R and R4 Shares) {Transposed}truefalsefalse1falseColumnprimaryElement*4false0rr_ExpenseExampleNoRedemptionByYearColumnNamerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Class B (if shares are not redeemed)falsefalsefalsetruefalse2falsefalsefalse00Class C (if shares are not redeemed)falsefalsefalsetruefalseOtherus-types:textBlockItemTypestringYou would pay the following expenses if you did not redeem your shares.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalseExpense Example, No Redemption, By Year, Column [Text]falseUSDfalsefalse$2falseColumnprimaryElement*5false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsetrue185185falsefalsefalsetruefalse2truefalsetrue185185falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse1 yearfalseUSDfalsefalse$3falseColumnprimaryElement*6false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsetrue573573falsefalsefalsetruefalse2truefalsetrue573573falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalse3 yearsfalseUSDfalsefalse$4falseColumnprimaryElement*7false0rr_ExpenseExampleNoRedemptionYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsetrue986986falsefalsefalsetruefalse2truefalsetrue986986falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse5 yearsfalseUSDfalsefalse$5falseColumnprimaryElement*8false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsetrue19451945falsefalsefalsetruefalse2truefalsetrue21422142falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalse10 yearsfalseUSDfalsefalse$1falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Brr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097526Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation FundClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class BUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Class B (if shares are not redeemed)Class B (if shares are not redeemed)falsefalsefalsetruefalse2truefalsetrue185185falsefalsefalsetruefalse3truefalsetrue573573falsefalsefalsetruefalse4truefalsetrue986986falsefalsefalsetruefalse5truefalsetrue19451945falsefalsefalsetruefalseOthernanafalsefalseColumbia Strategic Allocation Fund - Class B2falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097527Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation FundClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class CUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Class C (if shares are not redeemed)Class C (if shares are not redeemed)falsefalsefalsetruefalse2truefalsetrue185185falsefalsefalsetruefalse3truefalsetrue573573falsefalsefalsetruefalse4truefalsetrue986986falsefalsefalsetruefalse5truefalsetrue21422142falsefalsefalsetruefalseOthernanafalsefalseColumbia Strategic Allocation Fund - Class C52Expense Example, No Redemption - Columbia Strategic Allocation Fund (Class A, B, C, I, R and R4 Shares) Columbia Strategic Allocation Fund Class A, B, C, I, R and R4 Shares (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ExpenseExampleNoRedemption.No authoritative reference available.falsefalseExpense Example, No Redemption [Table]15false0rr_PortfolioTurnoverHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Portfolio TurnoverfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 5 -Subsection instructions falsefalsePortfolio Turnover [Heading]16false0rr_PortfolioTurnoverTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#8220;turns over&#8221; 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&#8217;s performance. During the most recent fiscal year, the Fund&#8217;s portfolio turnover rate was 114% of the average value of its portfolio (113% excluding mortgage dollar rolls).falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subsection example falsefalsePortfolio Turnover [Text Block]17false0rr_PortfolioTurnoverRaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse1.141.14falsefalsefalsefalsefalseOtherxbrli:pureItemTypepureThis element represents the rate of portfolio turnover presented as a percentage (SEC Form N-1A 2006-09-14 A.3.example.3 Portfolio Turnover A.3.instructions.5 Portfolio Turnover).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subsection example falsefalsePortfolio Turnover, Rate18false0rr_StrategyHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PRINCIPAL INVESTMENT STRATEGIES OF THE FUNDfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalseStrategy [Heading]19false0rr_StrategyNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p>The Fund&#8217;s assets primarily are allocated among nine different investment categories. The fixed income investment categories include: U.S. investment grade bonds, international bonds, emerging market bonds, U.S. high yield bonds and cash or cash equivalents. The equity investment categories currently include: emerging markets equities, international developed market equities, U.S. mid and small cap equities and U.S. large cap equities. These equity securities generally include common stocks.</p><p>Columbia Management Investment Advisers, LLC (the investment manager) uses proprietary, quantitative models to determine the portion of the Fund&#8217;s assets to be invested in each asset class. These models take into account various measures of the mean reversion (the tendency for an asset class or an investment category to return to its long-term historical average) and momentum (the tendency of an asset class or an investment category with good recent performance to continue that trend) of different asset classes. Prior to making an asset allocation change, the investment manager performs a qualitative review of the models&#8217; recommendations. Typically, tactical asset allocation changes will be made monthly to refine the Fund&#8217;s positioning. Tactical allocation is an active management portfolio strategy that reoptimizes (rebalances) the percentage of assets held in each asset class in an effort to take advantage of forecasted relative asset class returns.</p><p>The Fund may invest up to 50% of its net assets in foreign investments, which may include emerging markets, and up to 15% of its total assets in below investment-grade debt securities (junk bonds).</p><p> The day-to-day allocation of investments will remain within the ranges selected by the investment manager. As of the end of the most recent fiscal year, the ranges selected by the investment manager are: </p><div style="font-family: 'times new roman',times,serif"><table style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%"><tr valign="bottom"><td width="1%">&nbsp;</td><td width="33%">&nbsp;</td><td width="1%">&nbsp;</td><td width="1%">&nbsp;</td><td width="14%">&nbsp;</td><td width="1%">&nbsp;</td><td width="15%">&nbsp;</td><td width="1%">&nbsp;</td><td width="1%">&nbsp;</td><td width="4%">&nbsp;</td><td width="3%">&nbsp;</td><td width="1%">&nbsp;</td></tr><tr style="font-size: 1px" valign="bottom"><td align="left" colspan="12" style="border-bottom: 1px solid #000000">&nbsp;</td></tr><tr style="font-size: 8pt" valign="bottom"><td width="1%" style="border-left: 1px solid #000000">&nbsp;</td><td align="left"><b>Asset Class</b></td><td style="border-right: 1px solid #000000">&nbsp;</td><td>&nbsp;</td><td align="left" colspan="2"><b>Investment Category</b></td><td>&nbsp;</td><td style="border-right: 1px solid #000000">&nbsp;</td><td>&nbsp;</td><td align="left"><b>&nbsp;&nbsp;&nbsp;Range</b></td><td>&nbsp;</td><td width="1%" style="border-right: 1px solid #000000">&nbsp;</td></tr><tr valign="bottom"><td width="1%" style="border-left: 2px solid #000000; border-top: 1px solid #000000">&nbsp;</td><td valign="top" style="border-top: 1px solid #000000"><div style="margin-left:15px; text-indent:-15px">U.S. equity securities</div></td><td style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</td><td style="border-top: 1px solid #000000">&nbsp;</td><td colspan="3" align="left" style="border-top: 1px solid #000000">U.S. mid and small cap equities U.S. large cap equities</td><td style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</td><td style="border-top: 1px solid #000000">&nbsp;</td><td align="right" valign="top" style="border-top: 1px solid #000000">25-75</td><td valign="top" style="border-top: 1px solid #000000">%</td><td width="1%" style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</td></tr><tr valign="bottom"><td width="1%" style="border-left: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</td><td valign="top" style="border-top: 1px solid #000000"><div style="margin-left:15px; text-indent:-15px">U.S. and foreign debt securities</div></td><td style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</td><td style="border-top: 1px solid #000000">&nbsp;</td><td colspan="3" align="left" style="border-top: 1px solid #000000">U.S. investment grade bonds International bonds Emerging markets bonds U.S. high yield bonds</td><td style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</td><td style="border-top: 1px solid #000000">&nbsp;</td><td align="right" valign="top" style="border-top: 1px solid #000000">10-50</td><td valign="top" style="border-top: 1px solid #000000">%</td><td width="1%" style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</td></tr><tr valign="bottom"><td width="1%" style="border-left: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</td><td valign="top" style="border-top: 1px solid #000000"><div style="margin-left:15px; text-indent:-15px">Foreign equity securities</div></td><td style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</td><td style="border-top: 1px solid #000000">&nbsp;</td><td colspan="3" align="left" style="border-top: 1px solid #000000">Emerging markets equities International developed market equities</td><td style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</td><td style="border-top: 1px solid #000000">&nbsp;</td><td valign="top" align="right" style="border-top: 1px solid #000000">0-50</td><td valign="top" style="border-top: 1px solid #000000">%</td><td width="1%" style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</td></tr><tr valign="bottom"><td width="1%" style="border-left: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</td><td valign="top" style="border-top: 1px solid #000000"><div style="margin-left:15px; text-indent:-15px">Cash</div></td><td style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</td><td style="border-top: 1px solid #000000">&nbsp;</td><td colspan="3" align="left" style="border-top: 1px solid #000000">Cash and cash equivalents</td><td style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</td><td style="border-top: 1px solid #000000">&nbsp;</td><td valign="top" align="right" style="border-top: 1px solid #000000">0-30</td><td valign="top" style="border-top: 1px solid #000000">%</td><td width="1%" style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</td></tr><tr style="font-size: 1px" valign="bottom"><td align="left" colspan="13" style="border-top: 1px solid #000000">&nbsp;</td></tr></table></div><p>The Fund may invest in fixed income securities of any maturity and does not seek to maintain a particular dollar-weighted average maturity. A bond is issued with a specific maturity date, which is the date when the issuer must pay back the bond&#8217;s principal (face value). Bond maturities range from less than 1 year to more than 30 years. Typically, the longer a bond&#8217;s maturity, the more rice risk the Fund, and a bond fund investor, faces as interest rates rise, but the Fund could receive a higher yield in return for that longer maturity and higher interest rate risk.</p><p>The investment manager may use derivatives such as forward foreign currency contracts in an effort to produce incremental earnings or to hedge existing positions.</p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalseStrategy Narrative [Text Block]20false0rr_RiskHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PRINCIPAL RISKS OF INVESTING IN THE FUNDfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subsection b falsefalseRisk [Heading]21false0rr_RiskNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p>Please remember that with any mutual fund investment you may lose money. Principal risks associated with an investment in the Fund include:</p><p><b>Active Management Risk.</b> Due to its active management, the Fund could underperform other mutual funds with similar investment objectives.</p><p><b>Credit Risk.</b> Credit risk is the risk that fixed-income securities in the Fund&#8217;s portfolio will decline in price or fail to pay interest or repay principal when due because the issuer of the security or the counterparty to a contract will default or otherwise become unable or unwilling to honor its financial obligations. Unrated securities held by the Fund present increased credit risk.</p><p><b>Derivatives Risk &#8212; Forward Foreign Currency Contracts.</b> The Fund may enter into forward foreign contracts, which are types of derivative contracts, whereby the Fund may buy or sell a country&#8217;s currency at a specific price on a specific date, usually 30, 60, or 90 days in the future for a specific exchange rate on a given date. These contracts, however, may fall in value due to foreign currency value fluctuations. The Fund may enter into forward foreign currency contracts for risk management (hedging) or investment purposes. The Fund&#8217;s hedging strategy may be unable to achieve its objectives and may limit any potential gain that might result from an increase in the value of the currency. Unanticipated changes in the currency markets could result in reduced performance for the Fund. Cash or securities designated in an amount equal to the value of the Fund&#8217;s forward foreign currency contracts may limit the Fund&#8217;s investment flexibility. The Fund may incur a loss when engaging in offsetting transactions at, or prior to, maturity of a forward foreign currency contract. The Fund may also incur currency conversion costs when converting foreign currencies into U.S. dollars.</p><p><b>Risks of Foreign/Emerging Markets Investing.</b> Investments in foreign securities involve certain risks not associated with investments in U.S. companies. Foreign securities in the Fund&#8217;s portfolio subject the Fund to the risks associated with investing in the particular country, including the political, regulatory, economic, social and other conditions or events occurring in the country, as well as fluctuations in its currency and the risks associated with less developed custody and settlement practices.</p><p> Investments in emerging markets present greater risk of loss than a typical foreign security investment. Because of the less developed markets and economics and less mature governments and governmental institutions, the risks of investing in foreign securities can be intensified in the case of investments in issuers organized, domiciled or doing business in emerging markets.</p><p><b>High-Yield Securities Risk.</b> The Fund&#8217;s investment in below-investment grade fixed-income securities (i.e., high-yield or junk bonds) exposes the Fund to a greater risk of loss than a fund that invests solely in investment grade securities.</p><p><b>Interest Rate Risk.</b> Interest rate risk is the risk of losses attributable to changes in interest rates. When interest rates rise, prices of fixed-income securities generally fall. In general, the longer the maturity or duration of a fixed-income security, the greater its sensitivity to changes in interest rates. Interest rate changes also may increase prepayments of debt obligations.</p><p><b>Issuer Risk.</b> An issuer may perform poorly, and therefore, the value of its securities may decline, which would negatively affect the Fund&#8217;s performance.</p><p><b>Liquidity Risk.</b> Liquidity risk is the risk associated with a lack of marketability of securities which may make it difficult or impossible to sell the security at desirable prices in order to minimize loss. The Fund may have to lower the selling price, sell other investments, or forego another, more appealing investment opportunity.</p><p><b>Market Risk.</b> The market value of securities may fall, fail to rise, or fluctuate, sometimes rapidly and unpredictably. Market risk may affect a single issuer, sector of the economy, industry, or the market as a whole. These risks are generally greater for small and mid-sized companies.</p><p><b> Prepayment and Extension Risk.</b> Prepayment and extension risk is the risk that a loan, bond or other security might be called or otherwise converted, prepaid or redeemed before maturity, and the portfolio managers may not be able to invest the proceeds in securities or loans providing as high a level of income, resulting in a reduced yield to the Fund. As interest rates rise or spreads widen, the likelihood of prepayment decreases. The portfolio managers may be unable to capitalize on securities with higher interest rates or wider spreads because the Fund&#8217;s investments are locked in at a lower rate for a longer period of time.</p><p><b>Quantitative Model Risk.</b> Securities selected using quantitative methods may perform differently from the market as a whole. There can be no assurance that these methodologies will enable the Fund to achieve its objective.</p><p><b>Small and Mid-Sized Company Risk.</b> Investments in small and medium size companies often involve greater risks than investments in larger, more established companies, including less predictable earnings and lack of experienced management, financial resources, product diversification and competitive strengths.</p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringNarrative Risk Disclosure. A Fund may, in responding to this Item, describe the types of investors for whom the Fund is intended or the types of investment goals that may be consistent with an investment in the Fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph i -Clause instruction -Subsection b falsefalseRisk Narrative [Text Block]22false0rr_BarChartAndPerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PAST PERFORMANCEfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalseBar Chart and Performance Table [Heading]23false0rr_PerformanceNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p>The following bar chart and table provide some illustration of the risks of investing in the Fund by showing, respectively:</p><p>&#8226; how the Fund&#8217;s Class A performance has varied for each full calendar year shown on the bar chart; and</p><p> &#8226; how the Fund&#8217;s average annual total returns compare to recognized measures of market performance shown on the table as well as a blended index.</p><p> How the Fund has performed in the past (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information can be obtained by calling toll-free 800.345.6611 or visiting columbiamanagement.com.</p><p>Class A share information is shown in the bar chart; the sales charge for Class A shares is not reflected in the bar chart. If the sales charge was reflected, returns would be lower than those shown.</p><p>After-tax returns are shown only for Class A shares. After-tax returns for the other classes will vary. After-tax returns are calculated using the highest historical individual federal marginal income tax rate and do not reflect the impact of state and local taxes. Actual after-tax returns will depend on your tax situation and most likely will differ from the returns shown in the table. If you hold your shares in a tax-deferred account, such as a 401(k) plan or an IRA, the after-tax returns do not apply to you since you will not incur taxes until you begin to withdraw from your account.</p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalsePerformance Narrative [Text Block]24false0rr_BarChartHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00CLASS A ANNUAL TOTAL RETURNS (WITHOUT SALES CHARGE)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalseBar Chart [Heading]25false0rr_BarChartTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> &lt;div style="display:none;"&gt;~ http://columbiamanagement.com/role/AnnualTotalReturnsBarChartColumbiaStrategicAllocationFundClassABCIRAndR4Shares column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_DocumentInformationDocumentAxis compact cfst1352280_S000031367_Member * row dei_LegalEntityAxis compact cfst1352280_Prospectus_Three_Member * ~&lt;/div&gt; </div>falsefalseBarChart3.jpg<div> &lt;div style="display:none;"&gt;~ http://columbiamanagement.com/role/AnnualTotalReturnsBarChartColumbiaStrategicAllocationFundClassABCIRAndR4Shares column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_DocumentInformationDocumentAxis compact cfst1352280_S000031367_Member * row dei_LegalEntityAxis compact cfst1352280_Prospectus_Three_Member * ~&lt;/div&gt; </div>falsehttp://columbiamanagement.com/role/AnnualTotalReturnsBarChartColumbiaStrategicAllocationFundClassABCIRAndR4Sharesfalsefalse0200503 - Schedule - Annual Total Returns (Bar Chart) - Columbia Strategic Allocation Fund (Class A, B, C, I, R and R4 Shares)truefalsefalse1falseColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097525Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation FundClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class AUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*4false0rr_AnnualReturn2001rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.0512-0.0512falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse20010rr_AnnualReturn2001truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.0512-0.0512falsefalsefalsetruefalseOthernanafalsefalse20012falseRowprimaryElement*5false0rr_AnnualReturn2002rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.1259-0.1259falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse20020rr_AnnualReturn2002truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.1259-0.1259falsefalsefalsetruefalseOthernanafalsefalse20023falseRowprimaryElement*6false0rr_AnnualReturn2003rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.19750.1975falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse20030rr_AnnualReturn2003truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.19750.1975falsefalsefalsetruefalseOthernanafalsefalse20034falseRowprimaryElement*7false0rr_AnnualReturn2004rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.12930.1293falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse20040rr_AnnualReturn2004truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.12930.1293falsefalsefalsetruefalseOthernanafalsefalse20045falseRowprimaryElement*8false0rr_AnnualReturn2005rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.07390.0739falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse20050rr_AnnualReturn2005truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.07390.0739falsefalsefalsetruefalseOthernanafalsefalse20056falseRowprimaryElement*9false0rr_AnnualReturn2006rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.16150.1615falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse20060rr_AnnualReturn2006truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.16150.1615falsefalsefalsetruefalseOthernanafalsefalse20067falseRowprimaryElement*10false0rr_AnnualReturn2007rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.06890.0689falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse20070rr_AnnualReturn2007truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.06890.0689falsefalsefalsetruefalseOthernanafalsefalse20078falseRowprimaryElement*11false0rr_AnnualReturn2008rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.3021-0.3021falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse20080rr_AnnualReturn2008truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.3021-0.3021falsefalsefalsetruefalseOthernanafalsefalse20089falseRowprimaryElement*12false0rr_AnnualReturn2009rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.18580.1858falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse20090rr_AnnualReturn2009truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.18580.1858falsefalsefalsetruefalseOthernanafalsefalse200910falseRowprimaryElement*13false0rr_AnnualReturn2010rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.10650.1065falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse20100rr_AnnualReturn2010truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.10650.1065falsefalsefalsetruefalseOthernanafalsefalse2010110Annual Total Returns (Bar Chart) - Columbia Strategic Allocation Fund (Class A, B, C, I, R and R4 Shares) UnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to BarChartData.No authoritative reference available.falsefalseBar Chart [Table]26false0rr_BarChartClosingTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p>During the periods shown: </p><p> &#8226; Highest return for a calendar quarter was +12.30% (quarter ended Sept. 30, 2009) </p><p>&#8226; Lowest return for a calendar quarter was -13.95% (quarter ended Dec. 31, 2008)</p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalseBar Chart Closing [Text Block]27false0rr_AverageAnnualReturnCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Average Annual Total Returns (after applicable sales charges) (for periods ended Dec. 31, 2010)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 5 -Subsection b falsefalseCaption28false0rr_PerformanceTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> &lt;div style="display:none;"&gt;~ http://columbiamanagement.com/role/AverageAnnualTotalReturnsColumbiaStrategicAllocationFundClassABCIRAndR4Shares column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_DocumentInformationDocumentAxis compact cfst1352280_S000031367_Member * row dei_LegalEntityAxis compact cfst1352280_Prospectus_Three_Member * ~&lt;/div&gt; </div>falsefalse<div> &lt;div style="display:none;"&gt;~ http://columbiamanagement.com/role/AverageAnnualTotalReturnsColumbiaStrategicAllocationFundClassABCIRAndR4Shares column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_DocumentInformationDocumentAxis compact cfst1352280_S000031367_Member * row dei_LegalEntityAxis compact cfst1352280_Prospectus_Three_Member * ~&lt;/div&gt; </div>truehttp://columbiamanagement.com/role/AverageAnnualTotalReturnsColumbiaStrategicAllocationFundClassABCIRAndR4Sharesfalsefalse0200603 - Schedule - Average Annual Total Returns - Columbia Strategic Allocation Fund (Class A, B, C, I, R and R4 Shares) {Transposed}truefalsefalse1falseColumnprimaryElement*4false0rr_AverageAnnualReturnColumnNamerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsefalsetruefalse2falsetruefalse00Columbia Strategic Allocation Fund:falsefalsefalsetruefalse3falsetruefalse00Columbia Strategic Allocation Fund:falsefalsefalsetruefalse4falsetruefalse00Columbia Strategic Allocation Fund:falsefalsefalsetruefalse5falsetruefalse00Columbia Strategic Allocation Fund:falsefalsefalsetruefalse6falsetruefalse00Columbia Strategic Allocation Fund:falsefalsefalsetruefalse7falsetruefalse00Columbia Strategic Allocation Fund:falsefalsefalsetruefalse8falsetruefalse00Columbia Strategic Allocation Fund:falsefalsefalsetruefalse9falsetruefalse00Columbia Strategic Allocation Fund:falsefalsefalsetruefalse10falsetruefalse00falsefalsefalsetruefalse11falsetruefalse00falsefalsefalsetruefalse12falsetruefalse00falsefalsefalsetruefalse13falsetruefalse00falsefalsefalsetruefalse14falsetruefalse00falsefalsefalsetruefalse15falsetruefalse00falsefalsefalsetruefalse16falsetruefalse00falsefalsefalsetruefalse17falsetruefalse00falsefalsefalsetruefalse18falsetruefalse00falsefalsefalsetruefalse19falsetruefalse00falsefalsefalsetruefalseOtherus-types:textBlockItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 1 -Subsection b falsefalseColumnfalseUSDfalsefalse$2falseColumnprimaryElement*5false0rr_AverageAnnualReturnLabelrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsefalsetruefalse2falsetruefalse00Class A before taxesfalsefalsefalsetruefalse3falsetruefalse00Class B before taxesfalsefalsefalsetruefalse4falsetruefalse00Class C before taxesfalsefalsefalsetruefalse5falsetruefalse00Class I before taxesfalsefalsefalsetruefalse6falsetruefalse00Class R before taxesfalsefalsefalsetruefalse7falsetruefalse00Class R4 before taxesfalsefalsefalsetruefalse8falsetruefalse00Class A after taxes on distributionsfalsefalsefalsetruefalse9falsetruefalse00Class A after taxes on distributions and redemption of fund sharesfalsefalsefalsetruefalse10falsetruefalse00S&P 500 Indexfalsefalsefalsetruefalse11falsetruefalse00falsefalsefalsetruefalse12falsetruefalse00Blended Index (consists of 45% S&P 500 Index, 40% Barclays Capital U.S. Aggregate Bond Index and 15% MSCI EAFE Indexfalsefalsefalsetruefalse13falsetruefalse00falsefalsefalsetruefalse14falsetruefalse00Barclays Capital U.S. Aggregate Bond Indexfalsefalsefalsetruefalse15falsetruefalse00falsefalsefalsetruefalse16falsetruefalse00Morgan Stanley Capital International (MSCI) Europe, Australasia and Far East (EAFE) Indexfalsefalsefalsetruefalse17falsetruefalse00falsefalsefalsetruefalse18falsetruefalse00Lipper Flexible Portfolio Funds Indexfalsefalsefalsetruefalse19falsetruefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalseLabelfalseUSDfalsefalse$3falseColumnprimaryElement*6false0rr_IndexNoDeductionForFeesExpensesTaxesrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsetruefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00(reflects no deduction for fees, expenses or taxes)falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00(reflects no deduction for fees, expenses or taxes)falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00(reflects no deduction for fees, expenses or taxes)falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00(reflects no deduction for fees, expenses or taxes)falsefalsefalsetruefalse17falsefalsefalse00falsefalsefalsetruefalse18falsefalsefalse00(reflects no deduction for fees or taxes)falsefalsefalsetruefalse19falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringThe Performance Table includes a parenthetical, indicating that the Index "(reflects no deduction for fees, expenses or taxes)". This tag is used when this is reflected in a footnote.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 5 -Subsection b falsefalseIndex No Deduction for Fees, Expenses, Taxes [Text]falseUSDfalsefalse$4falseColumnprimaryElement*7false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsetruetrue00falsefalsefalsetruefalse2truetruetrue0.04290.0429falsefalsefalsetruefalse3truetruetrue0.04880.0488falsefalsefalsetruefalse4truetruetrue0.08850.0885falsefalsefalsetruefalse5truetruetrue0.11270.1127falsefalsefalsetruefalse6truetruetrue0.10300.1030falsefalsefalsetruefalse7truetruetrue0.10840.1084falsefalsefalsetruefalse8truetruetrue0.03610.0361falsefalsefalsetruefalse9truetruetrue0.03080.0308falsefalsefalsetruefalse10truetruetrue0.15060.1506falsefalsefalsetruefalse11falsetruetrue00falsefalsefalsetruefalse12truetruetrue0.11170.1117falsefalsefalsetruefalse13falsetruetrue00falsefalsefalsetruefalse14truetruetrue0.06540.0654falsefalsefalsetruefalse15falsetruetrue00falsefalsefalsetruefalse16truetruetrue0.08210.0821falsefalsefalsetruefalse17falsetruetrue00falsefalsefalsetruefalse18truetruetrue0.12910.1291falsefalsefalsetruefalse19falsetruetrue00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse1 yearfalseUSDfalsefalse$5falseColumnprimaryElement*8false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsetruetrue00&nbsp;falsefalsefalsetruefalse2truetruetrue0.01390.0139falsefalsefalsetruefalse3truetruetrue0.01470.0147falsefalsefalsetruefalse4truetruetrue0.01850.0185falsefalsefalsetruefalse5falsetruetrue00falsefalsefalsetruefalse6falsetruetrue00falsefalsefalsetruefalse7truetruetrue0.02780.0278falsefalsefalsetruefalse8truetruetrue0.00460.0046falsefalsefalsetruefalse9truetruetrue0.00810.0081falsefalsefalsetruefalse10truetruetrue0.02290.0229falsefalsefalsetruefalse11falsetruetrue00falsefalsefalsetruefalse12truetruetrue0.04250.0425falsefalsefalsetruefalse13falsetruetrue00falsefalsefalsetruefalse14truetruetrue0.05800.0580falsefalsefalsetruefalse15falsetruetrue00falsefalsefalsetruefalse16truetruetrue0.02940.0294falsefalsefalsetruefalse17falsetruetrue00falsefalsefalsetruefalse18truetruetrue0.04750.0475falsefalsefalsetruefalse19falsetruetrue00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse5 yearsfalseUSDfalsefalse$6falseColumnprimaryElement*9false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsetruetrue00&nbsp;falsefalsefalsetruefalse2truetruetrue0.02580.0258falsefalsefalsetruefalse3truetruetrue0.02410.0241falsefalsefalsetruefalse4truetruetrue0.02410.0241falsefalsefalsetruefalse5falsetruetrue00falsefalsefalsetruefalse6falsetruetrue00falsefalsefalsetruefalse7truetruetrue0.03370.0337falsefalsefalsetruefalse8truetruetrue0.01800.0180falsefalsefalsetruefalse9truetruetrue0.01840.0184falsefalsefalsetruefalse10truetruetrue0.01410.0141falsefalsefalsetruefalse11falsetruetrue00falsefalsefalsetruefalse12truetruetrue0.03960.0396falsefalsefalsetruefalse13falsetruetrue00falsefalsefalsetruefalse14truetruetrue0.05840.0584falsefalsefalsetruefalse15falsetruetrue00falsefalsefalsetruefalse16truetruetrue0.03940.0394falsefalsefalsetruefalse17falsetruetrue00falsefalsefalsetruefalse18truetruetrue0.03640.0364falsefalsefalsetruefalse19falsetruetrue00falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse10 yearsfalseUSDfalsefalse$7falseColumnprimaryElement*10false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsetruetrue00falsefalsefalsetruefalse2falsetruetrue00falsefalsefalsetruefalse3falsetruetrue00falsefalsefalsetruefalse4falsetruetrue00falsefalsefalsetruefalse5truetruetrue0.00090.0009falsefalsefalsetruefalse6truetruetrue-0.0059-0.0059falsefalsefalsetruefalse7falsetruetrue00falsefalsefalsetruefalse8falsetruetrue00falsefalsefalsetruefalse9falsetruetrue00falsefalsefalsetruefalse10falsetruetrue00falsefalsefalsetruefalse11truetruetrue-0.0070-0.0070falsefalsefalsetruefalse12falsetruetrue00falsefalsefalsetruefalse13truetruetrue0.02290.0229falsefalsefalsetruefalse14falsetruetrue00falsefalsefalsetruefalse15truetruetrue0.05950.0595falsefalsefalsetruefalse16falsetruetrue00falsefalsefalsetruefalse17truetruetrue-0.0179-0.0179falsefalsefalsetruefalse18falsetruetrue00falsefalsefalsetruefalse19truetruetrue0.02870.0287falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalseSince inceptionfalseUSDfalsefalse$8falseColumnprimaryElement*11false0rr_AverageAnnualReturnInceptionDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsetruetruefalse2falsetruefalse00falsefalsetruetruefalse3falsetruefalse00falsefalsetruetruefalse4falsetruefalse00falsefalsetruetruefalse5falsetruefalse002006-12-11falsefalsetruetruefalse6falsetruefalse002006-12-11falsefalsetruetruefalse7falsetruefalse00falsefalsetruetruefalse8falsetruefalse00falsefalsetruetruefalse9falsetruefalse00falsefalsetruetruefalse10falsetruefalse00falsefalsetruetruefalse11falsetruefalse002006-12-11falsefalsetruetruefalse12falsetruefalse00falsefalsetruetruefalse13falsetruefalse002006-12-11falsefalsetruetruefalse14falsetruefalse00falsefalsetruetruefalse15falsetruefalse002006-12-11falsefalsetruetruefalse16falsetruefalse00falsefalsetruetruefalse17falsetruefalse002006-12-11falsefalsetruetruefalse18falsetruefalse00falsefalsetruetruefalse19falsetruefalse002006-12-11falsefalsetruetruefalseOtherxbrli:dateItemTypedateReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 4 -Subsection b falsefalseInception DatefalseUSDfalsefalse$1falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMembertruefalsePerformance Measurerr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation FundPerformance MeasureClass A, B, C, I, R and R4 SharesShare ClassesUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsetruetrue00&nbsp;&nbsp;falsefalsefalsetruefalse6falsetruetrue00&nbsp;&nbsp;falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsefalsefalse8falsefalsefalse00falsefalsefalsefalsefalseOthernanafalsefalseColumbia Strategic Allocation Fund2falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalsebefore taxesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ReturnBeforeTaxMemberrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097525Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation Fundbefore taxesClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class AStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Columbia Strategic Allocation Fund:Columbia Strategic Allocation Fund:falsefalsefalsetruefalse2falsetruefalse00Class A before taxesClass A before taxesfalsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsefalsefalse4truetruetrue0.04290.0429falsefalsefalsetruefalse5truetruetrue0.01390.0139falsefalsefalsetruefalse6truetruetrue0.02580.0258falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsefalsefalse8falsefalsefalse00falsefalsefalsefalsefalseOthernanafalsefalseColumbia Strategic Allocation Fund before taxes Columbia Strategic Allocation Fund - Class A3falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalsebefore taxesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ReturnBeforeTaxMemberrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Brr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097526Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation Fundbefore taxesClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class BStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Columbia Strategic Allocation Fund:Columbia Strategic Allocation Fund:falsefalsefalsetruefalse2falsetruefalse00Class B before taxesClass B before taxesfalsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsefalsefalse4truetruetrue0.04880.0488falsefalsefalsetruefalse5truetruetrue0.01470.0147falsefalsefalsetruefalse6truetruetrue0.02410.0241falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsefalsefalse8falsefalsefalse00falsefalsefalsefalsefalseOthernanafalsefalseColumbia Strategic Allocation Fund before taxes Columbia Strategic Allocation Fund - Class B4falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalsebefore taxesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ReturnBeforeTaxMemberrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097527Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation Fundbefore taxesClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class CStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Columbia Strategic Allocation Fund:Columbia Strategic Allocation Fund:falsefalsefalsetruefalse2falsetruefalse00Class C before taxesClass C before taxesfalsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsefalsefalse4truetruetrue0.08850.0885falsefalsefalsetruefalse5truetruetrue0.01850.0185falsefalsefalsetruefalse6truetruetrue0.02410.0241falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsefalsefalse8falsefalsefalse00falsefalsefalsefalsefalseOthernanafalsefalseColumbia Strategic Allocation Fund before taxes Columbia Strategic Allocation Fund - Class C5falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalsebefore taxesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ReturnBeforeTaxMemberrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097528Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation Fundbefore taxesClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class IStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Columbia Strategic Allocation Fund:Columbia Strategic Allocation Fund:falsefalsefalsetruefalse2falsetruefalse00Class I before taxesClass I before taxesfalsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsefalsefalse4truetruetrue0.11270.1127falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7truetruetrue0.00090.0009falsefalsefalsetruefalse8falsetruefalse002006-12-112006-12-11falsefalsetruetruefalseOthernanafalsefalseColumbia Strategic Allocation Fund before taxes Columbia Strategic Allocation Fund - Class I6falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalsebefore taxesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ReturnBeforeTaxMemberrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Rrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097529Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation Fundbefore taxesClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class RStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Columbia Strategic Allocation Fund:Columbia Strategic Allocation Fund:falsefalsefalsetruefalse2falsetruefalse00Class R before taxesClass R before taxesfalsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsefalsefalse4truetruetrue0.10300.1030falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7truetruetrue-0.0059-0.0059falsefalsefalsetruefalse8falsetruefalse002006-12-112006-12-11falsefalsetruetruefalseOthernanafalsefalseColumbia Strategic Allocation Fund before taxes Columbia Strategic Allocation Fund - Class R7falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalsebefore taxesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ReturnBeforeTaxMemberrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class R4rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097530Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation Fundbefore taxesClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class R4Standard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Columbia Strategic Allocation Fund:Columbia Strategic Allocation Fund:falsefalsefalsetruefalse2falsetruefalse00Class R4 before taxesClass R4 before taxesfalsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsefalsefalse4truetruetrue0.10840.1084falsefalsefalsetruefalse5truetruetrue0.02780.0278falsefalsefalsetruefalse6truetruetrue0.03370.0337falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsefalsefalse8falsefalsefalse00falsefalsefalsefalsefalseOthernanafalsefalseColumbia Strategic Allocation Fund before taxes Columbia Strategic Allocation Fund - Class R48falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseafter taxes on distributionsrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsMemberrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097525Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation Fundafter taxes on distributionsClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class AStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Columbia Strategic Allocation Fund:Columbia Strategic Allocation Fund:falsefalsefalsetruefalse2falsetruefalse00Class A after taxes on distributionsClass A after taxes on distributionsfalsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsefalsefalse4truetruetrue0.03610.0361falsefalsefalsetruefalse5truetruetrue0.00460.0046falsefalsefalsetruefalse6truetruetrue0.01800.0180falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsefalsefalse8falsefalsefalse00falsefalsefalsefalsefalseOthernanafalsefalseColumbia Strategic Allocation Fund after taxes on distributions Columbia Strategic Allocation Fund - Class A9falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseColumbia Strategic Allocation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_S000031367Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseafter taxes on distributions and redemption of fund sharesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsAndSalesMemberrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseColumbia Strategic Allocation Fund - Class Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_C000097525Memberrr_ProspectusShareClassAxisexplicitMemberColumbia Strategic Allocation Fundafter taxes on distributions and redemption of fund sharesClass A, B, C, I, R and R4 SharesColumbia Strategic Allocation Fund - Class AStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Columbia Strategic Allocation Fund:Columbia Strategic Allocation Fund:falsefalsefalsetruefalse2falsetruefalse00Class A after taxes on distributions and redemption of fund sharesClass A after taxes on distributions and redemption of fund sharesfalsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsefalsefalse4truetruetrue0.03080.0308falsefalsefalsetruefalse5truetruetrue0.00810.0081falsefalsefalsetruefalse6truetruetrue0.01840.0184falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsefalsefalse8falsefalsefalse00falsefalsefalsefalsefalseOthernanafalsefalseColumbia Strategic Allocation Fund after taxes on distributions and redemption of fund shares Columbia Strategic Allocation Fund - Class A10falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseS & P 500 Indexdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_SAndPFiveHundredIndexMemberdei_DocumentInformationDocumentAxisexplicitMembertruefalsePerformance Measurerr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberS & P 500 IndexPerformance MeasureClass A, B, C, I, R and R4 SharesShare ClassesStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsetruefalse00S&P 500 IndexS&P 500 Indexfalsefalsefalsetruefalse3falsefalsefalse00(reflects no deduction for fees, expenses or taxes)(reflects no deduction for fees, expenses or taxes)falsefalsefalsetruefalse4truetruetrue0.15060.1506falsefalsefalsetruefalse5truetruetrue0.02290.0229falsefalsefalsetruefalse6truetruetrue0.01410.0141falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsefalsefalse8falsefalsefalse00falsefalsefalsefalsefalseOthernanafalsefalseS & P 500 Index11falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseS & P 500 Indexdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_SAndPFiveHundredIndexMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseSince Inception, 2006-12-11rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_InceptionFourMemberrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberS & P 500 IndexSince Inception, 2006-12-11Class A, B, C, I, R and R4 SharesShare ClassesStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7truetruetrue-0.0070-0.0070falsefalsefalsetruefalse8falsetruefalse002006-12-112006-12-11falsefalsetruetruefalseOthernanafalsefalseS & P 500 Index Since Inception, 2006-12-1112falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseBlended Index (consists of 45% S&P 500 Index, 40% Barclays Capital U.S. Aggregate Bond Index and 15% MSCI EAFE Indexdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_BlendedIndexconsistsOf45SP500Index40BarclaysCapitalUSAggregateBondIndexAnd15MSCIEFEIndexMemberdei_DocumentInformationDocumentAxisexplicitMembertruefalsePerformance Measurerr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberBlended Index (consists of 45% S&P 500 Index, 40% Barclays Capital U.S. Aggregate Bond Index and 15% MSCI EAFE IndexPerformance MeasureClass A, B, C, I, R and R4 SharesShare ClassesStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsetruefalse00Blended Index (consists of 45% S&P 500 Index, 40% Barclays Capital U.S. Aggregate Bond Index and 15% MSCI EAFE IndexBlended Index (consists of 45% S&P 500 Index, 40% Barclays Capital U.S. Aggregate Bond Index and 15% MSCI EAFE Indexfalsefalsefalsetruefalse3falsefalsefalse00(reflects no deduction for fees, expenses or taxes)(reflects no deduction for fees, expenses or taxes)falsefalsefalsetruefalse4truetruetrue0.11170.1117falsefalsefalsetruefalse5truetruetrue0.04250.0425falsefalsefalsetruefalse6truetruetrue0.03960.0396falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsefalsefalse8falsefalsefalse00falsefalsefalsefalsefalseOthernanafalsefalseBlended Index (consists of 45% S&P 500 Index, 40% Barclays Capital U.S. Aggregate Bond Index and 15% MSCI EAFE Index13falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseBlended Index (consists of 45% S&P 500 Index, 40% Barclays Capital U.S. Aggregate Bond Index and 15% MSCI EAFE Indexdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_BlendedIndexconsistsOf45SP500Index40BarclaysCapitalUSAggregateBondIndexAnd15MSCIEFEIndexMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseSince Inception, 2006-12-11rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_InceptionFourMemberrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberBlended Index (consists of 45% S&P 500 Index, 40% Barclays Capital U.S. Aggregate Bond Index and 15% MSCI EAFE IndexSince Inception, 2006-12-11Class A, B, C, I, R and R4 SharesShare ClassesStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7truetruetrue0.02290.0229falsefalsefalsetruefalse8falsetruefalse002006-12-112006-12-11falsefalsetruetruefalseOthernanafalsefalseBlended Index (consists of 45% S&P 500 Index, 40% Barclays Capital U.S. Aggregate Bond Index and 15% MSCI EAFE Index Since Inception, 2006-12-1114falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseBarclays Capital U.S. Aggregate Bond Indexdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_BarclaysCapitalUSAggregateBondIndexMemberdei_DocumentInformationDocumentAxisexplicitMembertruefalsePerformance Measurerr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberBarclays Capital U.S. Aggregate Bond IndexPerformance MeasureClass A, B, C, I, R and R4 SharesShare ClassesStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsetruefalse00Barclays Capital U.S. Aggregate Bond IndexBarclays Capital U.S. Aggregate Bond Indexfalsefalsefalsetruefalse3falsefalsefalse00(reflects no deduction for fees, expenses or taxes)(reflects no deduction for fees, expenses or taxes)falsefalsefalsetruefalse4truetruetrue0.06540.0654falsefalsefalsetruefalse5truetruetrue0.05800.0580falsefalsefalsetruefalse6truetruetrue0.05840.0584falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsefalsefalse8falsefalsefalse00falsefalsefalsefalsefalseOthernanafalsefalseBarclays Capital U.S. Aggregate Bond Index15falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseBarclays Capital U.S. Aggregate Bond Indexdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_BarclaysCapitalUSAggregateBondIndexMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseSince Inception, 2006-12-11rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_InceptionFourMemberrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberBarclays Capital U.S. Aggregate Bond IndexSince Inception, 2006-12-11Class A, B, C, I, R and R4 SharesShare ClassesStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7truetruetrue0.05950.0595falsefalsefalsetruefalse8falsetruefalse002006-12-112006-12-11falsefalsetruetruefalseOthernanafalsefalseBarclays Capital U.S. Aggregate Bond Index Since Inception, 2006-12-1116falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseMorgan Stanley Capital International (MSCI) Europe, Australasia and Far East (EAFE) Indexdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_MorganStanleyCapitalInternationalMSCIEuropeAustralasiaAndFarEastEAFEIndexMemberdei_DocumentInformationDocumentAxisexplicitMembertruefalsePerformance Measurerr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberMorgan Stanley Capital International (MSCI) Europe, Australasia and Far East (EAFE) IndexPerformance MeasureClass A, B, C, I, R and R4 SharesShare ClassesStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsetruefalse00Morgan Stanley Capital International (MSCI) Europe, Australasia and Far East (EAFE) IndexMorgan Stanley Capital International (MSCI) Europe, Australasia and Far East (EAFE) Indexfalsefalsefalsetruefalse3falsefalsefalse00(reflects no deduction for fees, expenses or taxes)(reflects no deduction for fees, expenses or taxes)falsefalsefalsetruefalse4truetruetrue0.08210.0821falsefalsefalsetruefalse5truetruetrue0.02940.0294falsefalsefalsetruefalse6truetruetrue0.03940.0394falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsefalsefalse8falsefalsefalse00falsefalsefalsefalsefalseOthernanafalsefalseMorgan Stanley Capital International (MSCI) Europe, Australasia and Far East (EAFE) Index17falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseMorgan Stanley Capital International (MSCI) Europe, Australasia and Far East (EAFE) Indexdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_MorganStanleyCapitalInternationalMSCIEuropeAustralasiaAndFarEastEAFEIndexMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseSince Inception, 2006-12-11rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_InceptionFourMemberrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberMorgan Stanley Capital International (MSCI) Europe, Australasia and Far East (EAFE) IndexSince Inception, 2006-12-11Class A, B, C, I, R and R4 SharesShare ClassesStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7truetruetrue-0.0179-0.0179falsefalsefalsetruefalse8falsetruefalse002006-12-112006-12-11falsefalsetruetruefalseOthernanafalsefalseMorgan Stanley Capital International (MSCI) Europe, Australasia and Far East (EAFE) Index Since Inception, 2006-12-1118falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseLipper Flexible Portfolio Funds Indexdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_LipperFlexiblePortfolioFundsIndexMemberdei_DocumentInformationDocumentAxisexplicitMembertruefalsePerformance Measurerr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberLipper Flexible Portfolio Funds IndexPerformance MeasureClass A, B, C, I, R and R4 SharesShare ClassesStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsetruefalse00Lipper Flexible Portfolio Funds IndexLipper Flexible Portfolio Funds Indexfalsefalsefalsetruefalse3falsefalsefalse00(reflects no deduction for fees or taxes)(reflects no deduction for fees or taxes)falsefalsefalsetruefalse4truetruetrue0.12910.1291falsefalsefalsetruefalse5truetruetrue0.04750.0475falsefalsefalsetruefalse6truetruetrue0.03640.0364falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsefalsefalse8falsefalsefalse00falsefalsefalsefalsefalseOthernanafalsefalseLipper Flexible Portfolio Funds Index19falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-19T00:00:002011-02-18T00:00:00falsefalseLipper Flexible Portfolio Funds Indexdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_LipperFlexiblePortfolioFundsIndexMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseSince Inception, 2006-12-11rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_InceptionFourMemberrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, B, C, I, R and R4 Sharesdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicfst1352280_ProspectusThreeMemberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberLipper Flexible Portfolio Funds IndexSince Inception, 2006-12-11Class A, B, C, I, R and R4 SharesShare ClassesStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7truetruetrue0.02870.0287falsefalsefalsetruefalse8falsetruefalse002006-12-112006-12-11falsefalsetruetruefalseOthernanafalsefalseLipper Flexible Portfolio Funds Index Since Inception, 2006-12-11819Average Annual Total Returns - Columbia Strategic Allocation Fund (Class A, B, C, I, R and R4 Shares) Class A, B, C, I, R and R4 SharesUnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to PerformanceTableData.No authoritative reference available.falsefalsePerformance [Table]29false0rr_PerformanceTableNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p>The S&#038;P 500 Index, the Barclays Capital U.S. Aggregate Bond Index and the MSCI EAFE Index are components of the Blended Index and are used to calculate its return.</p><p>Fund performance information prior to March 7, 2011 represents that of the Fund as a series of RiverSource Strategic Allocation Series, Inc., a Minnesota corporation. The Fund was reorganized into a series of Columbia Funds Series Trust II, a Massachusetts business trust, on that date.</p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringIf the Fund has annual returns for at least one calendar year, provide a table showing the Fund's (A) average annual total return; (B) average annual total return (after taxes on distributions); and (C) average annual total return (after taxes on distributions and redemption). A Money Market Fund should show only the returns described in clause (A) of the preceding sentence. All returns should be shown for 1-, 5-, and 10- calendar year periods ending on the date of the most recently completed calendar year (or for the life of the Fund, if shorter), but only for periods subsequent to the effective date of the Fund's registration statement. The table also shouldshow the returns of an appropriate broadbased securities market index as defined in Instruction 5 to Item 22(b)(7) for the same periods. A Fund that has been in existence for more than 10 years also may include returns for the life of the Fund. A Money Market Fund may provide the Fund's 7-day yield ending on the date of the most recent calendar year or disclose a toll-free (or collect) telephone number that investors can use to obtain the Fund's current 7-day yield. For a Fund (other than a Money Market Fund or a Fund described in General Instruction C.3.(d)(iii)), provide the information in the following table with the specified captions AVERAGE ANNUAL TOTAL RETURNS (For the periods ended December 31, _____). For a Fund that provides annual total returns for only one calendar year or for a Fund that does not include the bar chart because it does not have annual returns for a full calendar year, modify, as appropriate, the narrative explanation required by paragraph (c)(2)(i) (e.g., by stating that the information gives some indication of the risks of an investment in the Fund by comparing the Fund's performance with a broad measure of market performance).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iv -Subsection b falsefalsePerformance Table Narrative128Risk/Return Summary - Columbia Strategic Allocation Fund (Class A, B, C, I, R and R4 Shares) (Columbia Strategic Allocation Fund, Class A, B, C, I, R and R4 Shares)UnKnownUnKnownUnKnownUnKnowntruetrue