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LabelElementValue
Risk/Return:rr_RiskReturnAbstract 
Document Typedei_DocumentTypeOther
Document Period End Datedei_DocumentPeriodEndDateMar. 07, 2011
Registrant Namedei_EntityRegistrantNameColumbia Funds Series Trust II
Central Index Keydei_EntityCentralIndexKey0001352280
Amendment Flagdei_AmendmentFlagfalse
Document Creation Datedei_DocumentCreationDateSep. 30, 2011
Document Effective Datedei_DocumentEffectiveDateSep. 30, 2011
Prospectus Daterr_ProspectusDateFeb. 18, 2011
Supplement [Text Block]rst1352280_SupplementTextBlock
Prospectus Supplement — September 30, 2011
to the Prospectuses listed below, each as supplemented
 FundProspectuses Dated
 Columbia Seligman Global Technology Fund 12/30/2010
Effective September 30, 2011, the Fund compares its performance to the net dividends (Net) versions of the Morgan Stanley Capital International (MSCI) World IT Index and the MSCI World Index rather than to the gross dividends (Gross) versions currently reflected in the Fund’s prospectuses. Accordingly, the average annual total returns tables in the “Past Performance” sections of the Fund’s prospectuses are hereby replaced with the following and should be retained with the current prospectus for the Fund for future reference.
Columbia Seligman Global Technology Fund | Class A, B, C, I, R, R4 and R5 Shares
 
Risk/Return:rr_RiskReturnAbstract 
Supplement [Text Block]rst1352280_SupplementTextBlock

The average annual total returns table in the “Past Performance” section of the prospectus for Class A, Class B, Class C, Class I, Class R, Class R4 and Class R5 shares is hereby replaced with the following:

Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Captionrr_AverageAnnualReturnCaptionAverage Annual Total Returns (after applicable sales charges) (for periods ended December 31, 2010)
Performance Table Market Index Changedrr_PerformanceTableMarketIndexChangedOn September 30, 2011, the MSCI World IT Index (Net) and the MSCI World Index (Net) replaced the MSCI World IT Index (Gross) and the MSCI World Index (Gross) as the Fund’s benchmarks.
Performance Table Narrativerr_PerformanceTableNarrativeTextBlockFund performance information prior to March 7, 2011 represents that of the Fund as a series of Seligman Global Fund Series, Inc., a Maryland corporation. The Fund was reorganized into a series of Columbia Funds Series Trust II, a Massachusetts business trust, on that date.
Columbia Seligman Global Technology Fund | Class A | Class A, B, C, I, R, R4 and R5 Shares | before taxes
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Columnrr_AverageAnnualReturnColumnNameColumbia Seligman Global Technology Fund:
Labelrr_AverageAnnualReturnLabelClass A — before taxes
1 yearrr_AverageAnnualReturnYear018.74%
5 yearsrr_AverageAnnualReturnYear057.67%
10 yearsrr_AverageAnnualReturnYear101.57%
Columbia Seligman Global Technology Fund | Class B | Class A, B, C, I, R, R4 and R5 Shares | before taxes
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Columnrr_AverageAnnualReturnColumnNameColumbia Seligman Global Technology Fund:
Labelrr_AverageAnnualReturnLabelClass B — before taxes
1 yearrr_AverageAnnualReturnYear019.52%
5 yearsrr_AverageAnnualReturnYear057.82%
10 yearsrr_AverageAnnualReturnYear101.39%
Columbia Seligman Global Technology Fund | Class C | Class A, B, C, I, R, R4 and R5 Shares | before taxes
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Columnrr_AverageAnnualReturnColumnNameColumbia Seligman Global Technology Fund:
Labelrr_AverageAnnualReturnLabelClass C — before taxes
1 yearrr_AverageAnnualReturnYear0113.53%
5 yearsrr_AverageAnnualReturnYear058.13%
10 yearsrr_AverageAnnualReturnYear101.40%
Columbia Seligman Global Technology Fund | Class I | Class A, B, C, I, R, R4 and R5 Shares | before taxes
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Columnrr_AverageAnnualReturnColumnNameColumbia Seligman Global Technology Fund:
Labelrr_AverageAnnualReturnLabelClass I — before taxes
1 yearrr_AverageAnnualReturnYear0115.85%
5 yearsrr_AverageAnnualReturnYear05 
10 yearsrr_AverageAnnualReturnYear10 
Since inceptionrr_AverageAnnualReturnSinceInception24.27%
Inception Daterr_AverageAnnualReturnInceptionDateAug. 03, 2009
Columbia Seligman Global Technology Fund | Class R | Class A, B, C, I, R, R4 and R5 Shares | before taxes
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Columnrr_AverageAnnualReturnColumnNameColumbia Seligman Global Technology Fund:
Labelrr_AverageAnnualReturnLabelClass R — before taxes
1 yearrr_AverageAnnualReturnYear0114.99%
5 yearsrr_AverageAnnualReturnYear058.65%
10 yearsrr_AverageAnnualReturnYear10 
Since inceptionrr_AverageAnnualReturnSinceInception11.35%
Inception Daterr_AverageAnnualReturnInceptionDateApr. 30, 2003
Columbia Seligman Global Technology Fund | Class R4 | Class A, B, C, I, R, R4 and R5 Shares | before taxes
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Columnrr_AverageAnnualReturnColumnNameColumbia Seligman Global Technology Fund:
Labelrr_AverageAnnualReturnLabelClass R4 — before taxes
1 yearrr_AverageAnnualReturnYear0115.55%
5 yearsrr_AverageAnnualReturnYear05 
10 yearsrr_AverageAnnualReturnYear10 
Since inceptionrr_AverageAnnualReturnSinceInception23.90%
Inception Daterr_AverageAnnualReturnInceptionDateAug. 03, 2009
Columbia Seligman Global Technology Fund | Class R5 | Class A, B, C, I, R, R4 and R5 Shares | before taxes
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Columnrr_AverageAnnualReturnColumnNameColumbia Seligman Global Technology Fund:
Labelrr_AverageAnnualReturnLabelClass R5 — before taxes
1 yearrr_AverageAnnualReturnYear0115.80%
5 yearsrr_AverageAnnualReturnYear05 
10 yearsrr_AverageAnnualReturnYear10 
Since inceptionrr_AverageAnnualReturnSinceInception24.18%
Inception Daterr_AverageAnnualReturnInceptionDateAug. 03, 2009
Columbia Seligman Global Technology Fund | Class A | Class A, B, C, I, R, R4 and R5 Shares | after taxes on distributions
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Columnrr_AverageAnnualReturnColumnNameColumbia Seligman Global Technology Fund:
Labelrr_AverageAnnualReturnLabelClass A — after taxes on distributions
1 yearrr_AverageAnnualReturnYear018.59%
5 yearsrr_AverageAnnualReturnYear057.64%
10 yearsrr_AverageAnnualReturnYear101.56%
Columbia Seligman Global Technology Fund | Class A | Class A, B, C, I, R, R4 and R5 Shares | after taxes on distributions and redemption of fund shares
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Columnrr_AverageAnnualReturnColumnNameColumbia Seligman Global Technology Fund:
Labelrr_AverageAnnualReturnLabelClass A — after taxes on distributions and redemption of fund shares
1 yearrr_AverageAnnualReturnYear015.78%
5 yearsrr_AverageAnnualReturnYear056.65%
10 yearsrr_AverageAnnualReturnYear101.34%
Columbia Seligman Global Technology Fund | Class A, B, C, I, R, R4 and R5 Shares | Morgan Stanley Capital International (MSCI) World IT Index (Net)
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Labelrr_AverageAnnualReturnLabelMorgan Stanley Capital International (MSCI) World IT Index (Net)[1]
Index No Deduction for Fees, Expenses, Taxes [Text]rr_IndexNoDeductionForFeesExpensesTaxes(reflects reinvested dividends net of withholding taxes but reflects no deduction for fees, expenses or other taxes)
1 yearrr_AverageAnnualReturnYear0110.50%
5 yearsrr_AverageAnnualReturnYear053.52%
10 yearsrr_AverageAnnualReturnYear10(1.98%)
Columbia Seligman Global Technology Fund | Class A, B, C, I, R, R4 and R5 Shares | Morgan Stanley Capital International (MSCI) World IT Index (Net) | Since Inception, 2009-08-03
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Since inceptionrr_AverageAnnualReturnSinceInception17.78%
Inception Daterr_AverageAnnualReturnInceptionDateAug. 03, 2009
Columbia Seligman Global Technology Fund | Class A, B, C, I, R, R4 and R5 Shares | Morgan Stanley Capital International (MSCI) World IT Index (Net) | Since Inception, 2003-04-30
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Since inceptionrr_AverageAnnualReturnSinceInception7.62%
Inception Daterr_AverageAnnualReturnInceptionDateApr. 30, 2003
Columbia Seligman Global Technology Fund | Class A, B, C, I, R, R4 and R5 Shares | MSCI World IT Index (Gross)
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Labelrr_AverageAnnualReturnLabelMSCI World IT Index (Gross)[1]
Index No Deduction for Fees, Expenses, Taxes [Text]rr_IndexNoDeductionForFeesExpensesTaxes(reflects no deduction for fees, expenses or taxes)
1 yearrr_AverageAnnualReturnYear0110.81%
5 yearsrr_AverageAnnualReturnYear053.79%
10 yearsrr_AverageAnnualReturnYear10(1.79%)
Columbia Seligman Global Technology Fund | Class A, B, C, I, R, R4 and R5 Shares | MSCI World IT Index (Gross) | Since Inception, 2009-08-03
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Since inceptionrr_AverageAnnualReturnSinceInception18.15%
Inception Daterr_AverageAnnualReturnInceptionDateAug. 03, 2009
Columbia Seligman Global Technology Fund | Class A, B, C, I, R, R4 and R5 Shares | MSCI World IT Index (Gross) | Since Inception, 2003-04-30
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Since inceptionrr_AverageAnnualReturnSinceInception7.87%
Inception Daterr_AverageAnnualReturnInceptionDateApr. 30, 2003
Columbia Seligman Global Technology Fund | Class A, B, C, I, R, R4 and R5 Shares | MSCI World Index (Net)
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Labelrr_AverageAnnualReturnLabelMSCI World Index (Net)[1]
Index No Deduction for Fees, Expenses, Taxes [Text]rr_IndexNoDeductionForFeesExpensesTaxes(reflects reinvested dividends net of withholding taxes but reflects no deduction for fees, expenses or other taxes)
1 yearrr_AverageAnnualReturnYear0111.76%
5 yearsrr_AverageAnnualReturnYear052.43%
10 yearsrr_AverageAnnualReturnYear102.31%
Columbia Seligman Global Technology Fund | Class A, B, C, I, R, R4 and R5 Shares | MSCI World Index (Net) | Since Inception, 2009-08-03
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Since inceptionrr_AverageAnnualReturnSinceInception16.11%
Inception Daterr_AverageAnnualReturnInceptionDateAug. 03, 2009
Columbia Seligman Global Technology Fund | Class A, B, C, I, R, R4 and R5 Shares | MSCI World Index (Net) | Since Inception, 2003-04-30
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Since inceptionrr_AverageAnnualReturnSinceInception8.15%
Inception Daterr_AverageAnnualReturnInceptionDateApr. 30, 2003
Columbia Seligman Global Technology Fund | Class A, B, C, I, R, R4 and R5 Shares | MSCI World Index (Gross)
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Labelrr_AverageAnnualReturnLabelMSCI World Index (Gross)[1]
Index No Deduction for Fees, Expenses, Taxes [Text]rr_IndexNoDeductionForFeesExpensesTaxes(reflects no deduction for fees, expenses or taxes)
1 yearrr_AverageAnnualReturnYear0112.34%
5 yearsrr_AverageAnnualReturnYear052.99%
10 yearsrr_AverageAnnualReturnYear102.82%
Columbia Seligman Global Technology Fund | Class A, B, C, I, R, R4 and R5 Shares | MSCI World Index (Gross) | Since Inception, 2009-08-03
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Since inceptionrr_AverageAnnualReturnSinceInception16.69%
Inception Daterr_AverageAnnualReturnInceptionDateAug. 03, 2009
Columbia Seligman Global Technology Fund | Class A, B, C, I, R, R4 and R5 Shares | MSCI World Index (Gross) | Since Inception, 2003-04-30
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Since inceptionrr_AverageAnnualReturnSinceInception8.71%
Inception Daterr_AverageAnnualReturnInceptionDateApr. 30, 2003
Columbia Seligman Global Technology Fund | Class A, B, C, I, R, R4 and R5 Shares | Lipper Global Science and Technology Funds Index
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Labelrr_AverageAnnualReturnLabelLipper Global Science and Technology Funds Index
Index No Deduction for Fees, Expenses, Taxes [Text]rr_IndexNoDeductionForFeesExpensesTaxes(reflects no deduction for fees or taxes)
1 yearrr_AverageAnnualReturnYear0123.41%
5 yearsrr_AverageAnnualReturnYear057.50%
10 yearsrr_AverageAnnualReturnYear100.07%
Columbia Seligman Global Technology Fund | Class A, B, C, I, R, R4 and R5 Shares | Lipper Global Science and Technology Funds Index | Since Inception, 2009-08-03
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Since inceptionrr_AverageAnnualReturnSinceInception29.89%
Inception Daterr_AverageAnnualReturnInceptionDateAug. 03, 2009
Columbia Seligman Global Technology Fund | Class A, B, C, I, R, R4 and R5 Shares | Lipper Global Science and Technology Funds Index | Since Inception, 2003-04-30
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Since inceptionrr_AverageAnnualReturnSinceInception11.08%
Inception Daterr_AverageAnnualReturnInceptionDateApr. 30, 2003
Columbia Seligman Global Technology Fund | Class Z Shares
 
Risk/Return:rr_RiskReturnAbstract 
Supplement [Text Block]rst1352280_SupplementTextBlockThe average annual total returns table in the “Past Performance” section of the prospectus for Class Z shares is hereby replaced with the following:
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Captionrr_AverageAnnualReturnCaptionAverage Annual Total Returns (without sales charge) (for periods ended December 31, 2010)
Bar Chart, Returns for Class Not Offered in Prospectus [Text]rr_BarChartReturnsForClassNotOfferedInProspectusThe returns shown are for Class A shares without the applicable front-end sales charge. Class Z shares, which are sold without a sales charge, would have substantially similar annual returns as Class A shares because the classes of shares invest in the same portfolio of securities and would differ only to the extent that the classes do not have the same expenses. Class A share returns have not been adjusted to reflect differences in class-related expenses.Class A share returns have not been adjusted to reflect differences in class-related expenses. If differences in class-related expenses were reflected (i.e., if expenses of Class Z shares were reflected in the Class A share returns), the returns shown for Class A shares for all periods would be higher.
Performance Table Market Index Changedrr_PerformanceTableMarketIndexChangedOn September 30, 2011, the MSCI World IT Index (Net) and the MSCI World Index (Net) replaced the MSCI World IT Index (Gross) and the MSCI World Index (Gross) as the Fund's benchmarks.
Performance Table Narrativerr_PerformanceTableNarrativeTextBlockFund performance information prior to March 7, 2011 represents that of the Fund as a series of Seligman Global Fund Series, Inc., a Maryland corporation. The Fund was reorganized into a series of Columbia Funds Series Trust II, a Massachusetts business trust, on that date.
Columbia Seligman Global Technology Fund | Class A | Class Z Shares | before taxes
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Columnrr_AverageAnnualReturnColumnNameColumbia Seligman Global Technology Fund:
Labelrr_AverageAnnualReturnLabelClass A — before taxes[2]
1 yearrr_AverageAnnualReturnYear0115.37%
5 yearsrr_AverageAnnualReturnYear058.95%
10 yearsrr_AverageAnnualReturnYear102.17%
Columbia Seligman Global Technology Fund | Class A | Class Z Shares | after taxes on distributions
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Columnrr_AverageAnnualReturnColumnNameColumbia Seligman Global Technology Fund:
Labelrr_AverageAnnualReturnLabelClass A — after taxes on distributions[2]
1 yearrr_AverageAnnualReturnYear0115.21%
5 yearsrr_AverageAnnualReturnYear058.92%
10 yearsrr_AverageAnnualReturnYear102.16%
Columbia Seligman Global Technology Fund | Class A | Class Z Shares | after taxes on distributions and redemption of fund shares
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Columnrr_AverageAnnualReturnColumnNameColumbia Seligman Global Technology Fund:
Labelrr_AverageAnnualReturnLabelClass A — after taxes on distributions and redemption of fund shares[2]
1 yearrr_AverageAnnualReturnYear0110.10%
5 yearsrr_AverageAnnualReturnYear057.77%
10 yearsrr_AverageAnnualReturnYear101.87%
Columbia Seligman Global Technology Fund | Class Z Shares | Morgan Stanley Capital International (MSCI) World IT Index (Net)
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Labelrr_AverageAnnualReturnLabelMorgan Stanley Capital International (MSCI) World IT Index (Net)[1]
Index No Deduction for Fees, Expenses, Taxes [Text]rr_IndexNoDeductionForFeesExpensesTaxes(reflects reinvested dividends net of withholding taxes but reflects no deduction for fees, expenses or other taxes)
1 yearrr_AverageAnnualReturnYear0110.50%
5 yearsrr_AverageAnnualReturnYear053.52%
10 yearsrr_AverageAnnualReturnYear10(1.98%)
Columbia Seligman Global Technology Fund | Class Z Shares | MSCI World IT Index (Gross)
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Labelrr_AverageAnnualReturnLabelMSCI World IT Index (Gross)[1]
Index No Deduction for Fees, Expenses, Taxes [Text]rr_IndexNoDeductionForFeesExpensesTaxes(reflects no deduction for fees, expenses or taxes)
1 yearrr_AverageAnnualReturnYear0110.81%
5 yearsrr_AverageAnnualReturnYear053.79%
10 yearsrr_AverageAnnualReturnYear10(1.79%)
Columbia Seligman Global Technology Fund | Class Z Shares | MSCI World Index (Net)
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Labelrr_AverageAnnualReturnLabelMSCI World Index (Net)[1]
Index No Deduction for Fees, Expenses, Taxes [Text]rr_IndexNoDeductionForFeesExpensesTaxes(reflects reinvested dividends net of withholding taxes but reflects no deduction for fees, expenses or other taxes)
1 yearrr_AverageAnnualReturnYear0111.76%
5 yearsrr_AverageAnnualReturnYear052.43%
10 yearsrr_AverageAnnualReturnYear102.31%
Columbia Seligman Global Technology Fund | Class Z Shares | MSCI World Index (Gross)
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Labelrr_AverageAnnualReturnLabelMSCI World Index (Gross)[1]
Index No Deduction for Fees, Expenses, Taxes [Text]rr_IndexNoDeductionForFeesExpensesTaxes(reflects no deduction for fees, expenses or taxes)
1 yearrr_AverageAnnualReturnYear0112.34%
5 yearsrr_AverageAnnualReturnYear052.99%
10 yearsrr_AverageAnnualReturnYear102.82%
Columbia Seligman Global Technology Fund | Class Z Shares | Lipper Global Science and Technology Funds Index
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Labelrr_AverageAnnualReturnLabelLipper Global Science and Technology Funds Index
Index No Deduction for Fees, Expenses, Taxes [Text]rr_IndexNoDeductionForFeesExpensesTaxes(reflects no deduction for fees or taxes)
1 yearrr_AverageAnnualReturnYear0123.41%
5 yearsrr_AverageAnnualReturnYear057.50%
10 yearsrr_AverageAnnualReturnYear100.07%
[1]On September 30, 2011, the MSCI World IT Index (Net) and the MSCI World Index (Net) replaced the MSCI World IT Index (Gross) and the MSCI World Index (Gross) as the Fund's benchmarks. The Fund's investment manager made this recommendation to the Fund's Board because the investment manager believes that the Net versions better reflect how dividends paid to the Fund on foreign securities generally are treated for tax purposes and, therefore, provide a more appropriate basis for comparing the Fund's performance. Information on both versions of each index will be included for a one-year transition period. Thereafter, only the Net versions will be included.
[2]The returns shown are for Class A shares without the applicable front-end sales charge. Class Z shares, which are sold without a sales charge, would have substantially similar annual returns as Class A shares because the classes of shares invest in the same portfolio of securities and would differ only to the extent that the classes do not have the same expenses. Class A share returns have not been adjusted to reflect differences in class-related expenses. If differences in class-related expenses were reflected (i.e., if expenses of Class Z shares were reflected in the Class A share returns), the returns shown for Class A shares for all periods would be higher.