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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName COLUMBIA FUNDS SERIES TRUST
Prospectus Date rr_ProspectusDate Jun. 01, 2013
Supplement [Text Block] cfst_SupplementTextBlock
Supplement dated June 28, 2013
to the Prospectus of the following funds:
Fund Prospectus Dated
Columbia Funds Series Trust  
 Columbia Capital Allocation Moderate Aggressive Portfolio 06/01/2013
 Columbia Capital Allocation Moderate Conservative Portfolio 06/01/2013
Columbia Funds Series Trust II  
 Columbia Capital Allocation Aggressive Portfolio 06/01/2013
 Columbia Capital Allocation Conservative Portfolio 06/01/2013
 Columbia Capital Allocation Moderate Portfolio 06/01/2013
(each a “Fund,” together the “Funds”)  
For Columbia Capital Allocation Conservative Portfolio
The “Average Annual Total Return” table within the section of the Fund’s Summary entitled “Performance Information” is deleted in its entirety and replaced with the following:
Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)
  Share Class
Inception Date 		1 Year 5 Years Life of Fund
Class A 03/04/2004      
returns before taxes   3.69% 3.34% 4.14%
returns after taxes on distributions   2.45% 2.26% 2.93%
returns after taxes on distributions and sale of Fund shares   2.72% 2.28% 2.91%
Class B returns before taxes 03/04/2004 3.08% 3.20% 3.92%
Class C returns before taxes 03/04/2004 7.05% 3.59% 3.93%
Class K returns before taxes 03/04/2004 9.04% 4.49% 4.88%
Class R returns before taxes 09/27/2010 8.59% 4.14% 4.50%
Class Z returns before taxes 09/27/2010 9.01% 4.46% 4.78%
Blended Index (66% Barclays U.S. Aggregate Bond Index, 15% Russell 3000 Index, 10% Citigroup 3-Month T-Bill Index, 5% MSCI EAFE Index (unhedged net) and 4% Barclays High Yield Corporate Bond Index) (reflects no deduction for fees, expenses or taxes)   6.76% 4.85% 5.20% (a)
Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)   4.21% 5.95% 5.20%
Russell 3000 Index (reflects no deduction for fees, expenses or taxes)   16.42% 2.04% 4.93%
 
(a) As of February 29, 2004.
On June 20, 2013, the Fund altered the composition of its Blended Index. This change was made based on a recommendation by the Fund’s Investment Manager to the Fund’s Board that the new Blended Index provides a more appropriate Fund performance comparison than the prior blended index.
The Citigroup 3-Month U.S. Treasury Bill Index and the MSCI EAFE Index (Gross) are no longer included as standalone benchmarks for Fund performance comparison purposes.
For Columbia Capital Allocation Moderate Conservative Portfolio
The “Average Annual Total Return” table within the section of the Fund’s Summary entitled “Performance Information” is deleted in its entirety and replaced with the following:
Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)
  Share Class
Inception Date 		1 Year 5 Years 10 Years
Class A 10/15/1996      
returns before taxes   4.08% 3.67% 5.85%
returns after taxes on distributions   2.80% 2.48% 4.53%
returns after taxes on distributions and sale of Fund shares   3.23% 2.53% 4.41%
Class B returns before taxes 08/07/1997 4.55% 3.76% 5.67%
Class C returns before taxes 10/15/1996 8.61% 4.11% 5.68%
Class R returns before taxes 01/23/2006 10.14% 4.65% 6.22%
Class R4 returns before taxes 11/08/2012 10.42% 4.89% 6.47%
Class R5 returns before taxes 11/08/2012 10.45% 4.90% 6.48%
Class Z returns before taxes 10/15/1996 10.71% 5.13% 6.73%
Blended Index (55.5% Barclays U.S. Aggregate Bond Index, 26% Russell 3000 Index, 9% MSCI EAFE Index (unhedged net), 5% Citigroup 3-Month T-Bill Index and 4.5% Barclays High Yield Corporate Bond Index) (reflects no deduction for fees, expenses or taxes)   8.93% 4.47% 6.50%
S&P 500 Index (reflects no deduction for fees, expenses or taxes)   16.00% 1.66% 7.10%
Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)   4.21% 5.95% 5.18%
Russell 3000 Index (reflects no deduction for fees, expenses or taxes)   16.42% 2.04% 7.68%
 
On June 20, 2013, the Fund added a Blended Index for Fund performance comparison purposes. This change was made based on a recommendation by the Fund’s Investment Manager to the Fund’s Board that the Blended Index provides a more appropriate basis for comparing the Fund’s performance. Effective as of the same date, the S&P 500 Index will no longer be a benchmark for the Fund’s performance. Information on the S&P 500 Index will be included only for a one-year transition period.
For Columbia Capital Allocation Moderate Portfolio
The “Average Annual Total Return” table within the section of the Fund’s Summary entitled “Performance Information” is deleted in its entirety and replaced with the following:
Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)
  Share Class
Inception Date 		1 Year 5 Years Life of Fund
Class A 03/04/2004      
returns before taxes   5.46% 2.49% 4.87%
returns after taxes on distributions   4.68% 1.64% 3.71%
returns after taxes on distributions and sale of Fund shares   3.72% 1.63% 3.60%
Class B returns before taxes 03/04/2004 6.05% 2.57% 4.78%
Class C returns before taxes 03/04/2004 10.01% 2.93% 4.79%
Class K returns before taxes 03/04/2004 12.01% 3.89% 5.79%
Class R returns before taxes 09/27/2010 11.62% 3.47% 5.33%
Class Z returns before taxes 09/27/2010 12.05% 3.83% 5.64%
Blended Index (42.5% Barclays U.S. Aggregate Bond Index, 37% Russell 3000 Index, 11% MSCI EAFE Index (unhedged net), 7.5% Barclays High Yield Corporate Bond Index and 2% MSCI Emerging Markets Index (net)) (reflects no deduction for fees, expenses or taxes)   11.41% 4.17% 5.87%
Russell 3000 Index (reflects no deduction for fees, expenses or taxes)   16.42% 2.04% 4.93%
Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)   4.21% 5.95% 5.20%
 
On June 20, 2013, the Fund altered the composition of its Blended Index. This change was made based on a recommendation by the Fund’s Investment Manager to the Fund’s Board that the new Blended Index provides a more appropriate Fund performance comparison than the prior blended index.
The MSCI EAFE Index (Gross) is no longer included as a standalone benchmark for Fund performance comparison purposes.
For Columbia Capital Allocation Moderate Aggressive Portfolio
The “Average Annual Total Return” table within the section of the Fund’s Summary entitled “Performance Information” is deleted in its entirety and replaced with the following:
Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)
  Share Class
Inception Date 		1 Year 5 Years 10 Years
Class A 10/15/1996      
returns before taxes   5.98% 2.50% 7.07%
returns after taxes on distributions   5.12% 1.54% 5.99%
returns after taxes on distributions and sale of Fund shares   4.59% 1.77% 5.75%
Class B returns before taxes 08/13/1997 6.58% 2.59% 6.90%
Class C returns before taxes 10/15/1996 10.62% 2.93% 6.91%
Class R returns before taxes 01/23/2006 12.16% 3.47% 7.44%
Class R4 returns before taxes 11/08/2012 12.40% 3.72% 7.71%
Class R5 returns before taxes 11/08/2012 12.43% 3.73% 7.71%
Class T returns before taxes 03/07/2011 6.02% 2.45% 7.02%
Class Z returns before taxes 10/15/1996 12.72% 4.01% 7.99%
Blended Index (49% Russell 3000 Index, 28.5% Barclays U.S. Aggregate Bond Index, 12% MSCI EAFE Index (unhedged net), 6.5% Barclays High Yield Corporate Bond Index and 4% MSCI Emerging Markets Index (net)) (reflects no deduction for fees, expenses or taxes)   13.19% 3.38% 7.93%
S&P 500 Index (reflects no deduction for fees, expenses or taxes)   16.00% 1.66% 7.10%
Russell 3000 Index (reflects no deduction for fees, expenses or taxes)   16.42% 2.04% 7.68%
Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)   4.21% 5.95% 5.18%
 
On June 20, 2013, the Fund added a Blended Index for Fund performance comparison purposes. This change was made based on a recommendation by the Fund’s Investment Manager to the Fund’s Board that the Blended Index provides a more appropriate basis for comparing the Fund’s performance. Effective as of the same date, the S&P 500 Index will no longer be a benchmark for the Fund’s performance. Information on the S&P 500 Index will be included only for a one-year transition period.
For Columbia Capital Allocation Aggressive Portfolio
The “Average Annual Total Return” table within the section of the Fund’s Summary entitled “Performance Information” is deleted in its entirety and replaced with the following:
Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)
  Share Class
Inception Date 		1 Year 5 Years Life of Fund
Class A 03/04/2004      
returns before taxes   7.98% 0.28% 4.32%
returns after taxes on distributions   7.72% -0.17% 3.39%
returns after taxes on distributions and sale of Fund shares   5.48% 0.01% 3.35%
Class B returns before taxes 03/04/2004 8.70% 0.31% 4.22%
Class C returns before taxes 03/04/2004 12.75% 0.72% 4.22%
Class K returns before taxes 03/04/2004 14.64% 1.68% 5.22%
Class R returns before taxes 09/27/2010 14.27% 1.27% 4.80%
Class Z returns before taxes 09/27/2010 14.88% 1.62% 5.10%
Blended Index (60% Russell 3000 Index, 15% Barclays U.S. Aggregate Bond Index, 14% MSCI EAFE Index (unhedged net), 6% MSCI Emerging Markets Index (net) and 5% Barclays High Yield Corporate Bond Index) (reflects no deduction for fees, expenses or taxes)   14.91% 2.43% 5.87%
Russell 3000 Index (reflects no deduction for fees, expenses or taxes)   16.42% 2.04% 4.93%
Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)   4.21% 5.95% 5.20%
 
On June 20, 2013, the Fund altered the composition of its Blended Index. This change was made based on a recommendation by the Fund’s Investment Manager to the Fund’s Board that the new Blended Index provides a more appropriate Fund performance comparison than the prior blended index.
The MSCI EAFE Index (Gross) is no longer included as a standalone benchmark for Fund performance comparison purposes.
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Conservative Portfolio
  
Risk/Return: rr_RiskReturnAbstract  
Supplement [Text Block] cfst_SupplementTextBlock
Supplement dated June 28, 2013
to the Prospectus of the following funds:
Fund Prospectus Dated
Columbia Funds Series Trust  
 Columbia Capital Allocation Moderate Aggressive Portfolio 06/01/2013
 Columbia Capital Allocation Moderate Conservative Portfolio 06/01/2013
Columbia Funds Series Trust II  
 Columbia Capital Allocation Aggressive Portfolio 06/01/2013
 Columbia Capital Allocation Conservative Portfolio 06/01/2013
 Columbia Capital Allocation Moderate Portfolio 06/01/2013
(each a “Fund,” together the “Funds”)  
For Columbia Capital Allocation Moderate Conservative Portfolio
The “Average Annual Total Return” table within the section of the Fund’s Summary entitled “Performance Information” is deleted in its entirety and replaced with the following:
Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)
  Share Class
Inception Date 		1 Year 5 Years 10 Years
Class A 10/15/1996      
returns before taxes   4.08% 3.67% 5.85%
returns after taxes on distributions   2.80% 2.48% 4.53%
returns after taxes on distributions and sale of Fund shares   3.23% 2.53% 4.41%
Class B returns before taxes 08/07/1997 4.55% 3.76% 5.67%
Class C returns before taxes 10/15/1996 8.61% 4.11% 5.68%
Class R returns before taxes 01/23/2006 10.14% 4.65% 6.22%
Class R4 returns before taxes 11/08/2012 10.42% 4.89% 6.47%
Class R5 returns before taxes 11/08/2012 10.45% 4.90% 6.48%
Class Z returns before taxes 10/15/1996 10.71% 5.13% 6.73%
Blended Index (55.5% Barclays U.S. Aggregate Bond Index, 26% Russell 3000 Index, 9% MSCI EAFE Index (unhedged net), 5% Citigroup 3-Month T-Bill Index and 4.5% Barclays High Yield Corporate Bond Index) (reflects no deduction for fees, expenses or taxes)   8.93% 4.47% 6.50%
S&P 500 Index (reflects no deduction for fees, expenses or taxes)   16.00% 1.66% 7.10%
Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)   4.21% 5.95% 5.18%
Russell 3000 Index (reflects no deduction for fees, expenses or taxes)   16.42% 2.04% 7.68%
 
On June 20, 2013, the Fund added a Blended Index for Fund performance comparison purposes. This change was made based on a recommendation by the Fund’s Investment Manager to the Fund’s Board that the Blended Index provides a more appropriate basis for comparing the Fund’s performance. Effective as of the same date, the S&P 500 Index will no longer be a benchmark for the Fund’s performance. Information on the S&P 500 Index will be included only for a one-year transition period.
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)
Performance Table Market Index Changed rr_PerformanceTableMarketIndexChanged On June 20, 2013, the Fund added a Blended Index for Fund performance comparison purposes. This change was made based on a recommendation by the Fund’s Investment Manager to the Fund’s Board that the Blended Index provides a more appropriate basis for comparing the Fund’s performance. Effective as of the same date, the S&P 500 Index will no longer be a benchmark for the Fund’s performance. Information on the S&P 500 Index will be included only for a one-year transition period.
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Conservative Portfolio | Class A
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 4.08%
5 Years rr_AverageAnnualReturnYear05 3.67%
10 Years rr_AverageAnnualReturnYear10 5.85%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Oct. 15, 1996
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Conservative Portfolio | Class B
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 4.55%
5 Years rr_AverageAnnualReturnYear05 3.76%
10 Years rr_AverageAnnualReturnYear10 5.67%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Aug. 07, 1997
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Conservative Portfolio | Class C
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 8.61%
5 Years rr_AverageAnnualReturnYear05 4.11%
10 Years rr_AverageAnnualReturnYear10 5.68%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Oct. 15, 1996
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Conservative Portfolio | Class R
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 10.14%
5 Years rr_AverageAnnualReturnYear05 4.65%
10 Years rr_AverageAnnualReturnYear10 6.22%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Jan. 23, 2006
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Conservative Portfolio | Class R4
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 10.42%
5 Years rr_AverageAnnualReturnYear05 4.89%
10 Years rr_AverageAnnualReturnYear10 6.47%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Nov. 08, 2012
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Conservative Portfolio | Class R5
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 10.45%
5 Years rr_AverageAnnualReturnYear05 4.90%
10 Years rr_AverageAnnualReturnYear10 6.48%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Nov. 08, 2012
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Conservative Portfolio | Class Z
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 10.71%
5 Years rr_AverageAnnualReturnYear05 5.13%
10 Years rr_AverageAnnualReturnYear10 6.73%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Oct. 15, 1996
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Conservative Portfolio | returns after taxes on distributions | Class A
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 2.80%
5 Years rr_AverageAnnualReturnYear05 2.48%
10 Years rr_AverageAnnualReturnYear10 4.53%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Oct. 15, 1996
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Conservative Portfolio | returns after taxes on distributions and sale of Fund shares | Class A
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 3.23%
5 Years rr_AverageAnnualReturnYear05 2.53%
10 Years rr_AverageAnnualReturnYear10 4.41%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Oct. 15, 1996
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Conservative Portfolio | Blended Index (55.5% Barclays U.S. Aggregate Bond Index, 26% Russell 3000 Index, 9% MSCI EAFE Index (unhedged net), 5% Citigroup 3- Month T-Bill Index and 4.5% Barclays High Yield Corporate Bond Index) (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 8.93%
5 Years rr_AverageAnnualReturnYear05 4.47%
10 Years rr_AverageAnnualReturnYear10 6.50%
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Conservative Portfolio | Russell 3000 Index (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 16.42%
5 Years rr_AverageAnnualReturnYear05 2.04%
10 Years rr_AverageAnnualReturnYear10 7.68%
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Conservative Portfolio | Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 4.21%
5 Years rr_AverageAnnualReturnYear05 5.95%
10 Years rr_AverageAnnualReturnYear10 5.18%
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Conservative Portfolio | S&P 500 Index (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 16.00%
5 Years rr_AverageAnnualReturnYear05 1.66%
10 Years rr_AverageAnnualReturnYear10 7.10%
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Aggressive Portfolio
  
Risk/Return: rr_RiskReturnAbstract  
Supplement [Text Block] cfst_SupplementTextBlock
Supplement dated June 28, 2013
to the Prospectus of the following funds:
Fund Prospectus Dated
Columbia Funds Series Trust  
 Columbia Capital Allocation Moderate Aggressive Portfolio 06/01/2013
 Columbia Capital Allocation Moderate Conservative Portfolio 06/01/2013
Columbia Funds Series Trust II  
 Columbia Capital Allocation Aggressive Portfolio 06/01/2013
 Columbia Capital Allocation Conservative Portfolio 06/01/2013
 Columbia Capital Allocation Moderate Portfolio 06/01/2013
(each a “Fund,” together the “Funds”)  
For Columbia Capital Allocation Moderate Aggressive Portfolio
The “Average Annual Total Return” table within the section of the Fund’s Summary entitled “Performance Information” is deleted in its entirety and replaced with the following:
Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)
  Share Class
Inception Date 		1 Year 5 Years 10 Years
Class A 10/15/1996      
returns before taxes   5.98% 2.50% 7.07%
returns after taxes on distributions   5.12% 1.54% 5.99%
returns after taxes on distributions and sale of Fund shares   4.59% 1.77% 5.75%
Class B returns before taxes 08/13/1997 6.58% 2.59% 6.90%
Class C returns before taxes 10/15/1996 10.62% 2.93% 6.91%
Class R returns before taxes 01/23/2006 12.16% 3.47% 7.44%
Class R4 returns before taxes 11/08/2012 12.40% 3.72% 7.71%
Class R5 returns before taxes 11/08/2012 12.43% 3.73% 7.71%
Class T returns before taxes 03/07/2011 6.02% 2.45% 7.02%
Class Z returns before taxes 10/15/1996 12.72% 4.01% 7.99%
Blended Index (49% Russell 3000 Index, 28.5% Barclays U.S. Aggregate Bond Index, 12% MSCI EAFE Index (unhedged net), 6.5% Barclays High Yield Corporate Bond Index and 4% MSCI Emerging Markets Index (net)) (reflects no deduction for fees, expenses or taxes)   13.19% 3.38% 7.93%
S&P 500 Index (reflects no deduction for fees, expenses or taxes)   16.00% 1.66% 7.10%
Russell 3000 Index (reflects no deduction for fees, expenses or taxes)   16.42% 2.04% 7.68%
Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)   4.21% 5.95% 5.18%
 
On June 20, 2013, the Fund added a Blended Index for Fund performance comparison purposes. This change was made based on a recommendation by the Fund’s Investment Manager to the Fund’s Board that the Blended Index provides a more appropriate basis for comparing the Fund’s performance. Effective as of the same date, the S&P 500 Index will no longer be a benchmark for the Fund’s performance. Information on the S&P 500 Index will be included only for a one-year transition period.
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)
Performance Table Market Index Changed rr_PerformanceTableMarketIndexChanged On June 20, 2013, the Fund added a Blended Index for Fund performance comparison purposes. This change was made based on a recommendation by the Fund’s Investment Manager to the Fund’s Board that the Blended Index provides a more appropriate basis for comparing the Fund’s performance. Effective as of the same date, the S&P 500 Index will no longer be a benchmark for the Fund’s performance. Information on the S&P 500 Index will be included only for a one-year transition period.
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Aggressive Portfolio | Class A
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 5.98%
5 Years rr_AverageAnnualReturnYear05 2.50%
10 Years rr_AverageAnnualReturnYear10 7.07%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Oct. 15, 1996
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Aggressive Portfolio | Class B
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 6.58%
5 Years rr_AverageAnnualReturnYear05 2.59%
10 Years rr_AverageAnnualReturnYear10 6.90%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Aug. 13, 1997
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Aggressive Portfolio | Class C
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 10.62%
5 Years rr_AverageAnnualReturnYear05 2.93%
10 Years rr_AverageAnnualReturnYear10 6.91%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Oct. 15, 1996
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Aggressive Portfolio | Class R
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 12.16%
5 Years rr_AverageAnnualReturnYear05 3.47%
10 Years rr_AverageAnnualReturnYear10 7.44%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Jan. 23, 2006
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Aggressive Portfolio | Class R4
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 12.40%
5 Years rr_AverageAnnualReturnYear05 3.72%
10 Years rr_AverageAnnualReturnYear10 7.71%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Nov. 08, 2012
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Aggressive Portfolio | Class R5
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 12.43%
5 Years rr_AverageAnnualReturnYear05 3.73%
10 Years rr_AverageAnnualReturnYear10 7.71%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Nov. 08, 2012
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Aggressive Portfolio | Class T
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 6.02%
5 Years rr_AverageAnnualReturnYear05 2.45%
10 Years rr_AverageAnnualReturnYear10 7.02%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Mar. 07, 2011
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Aggressive Portfolio | Class Z
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 12.72%
5 Years rr_AverageAnnualReturnYear05 4.01%
10 Years rr_AverageAnnualReturnYear10 7.99%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Oct. 15, 1996
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Aggressive Portfolio | returns after taxes on distributions | Class A
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 5.12%
5 Years rr_AverageAnnualReturnYear05 1.54%
10 Years rr_AverageAnnualReturnYear10 5.99%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Oct. 15, 1996
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Aggressive Portfolio | returns after taxes on distributions and sale of Fund shares | Class A
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 4.59%
5 Years rr_AverageAnnualReturnYear05 1.77%
10 Years rr_AverageAnnualReturnYear10 5.75%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Oct. 15, 1996
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Aggressive Portfolio | Blended Index (49% Russell 3000 Index, 28.5% Barclays U.S. Aggregate Bond Index, 12% MSCI EAFE Index (unhedged net), 6.5% Barclays High Yield Corporate Bond Index and 4% MSCI Emerging Markets Index (net)) (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 13.19%
5 Years rr_AverageAnnualReturnYear05 3.38%
10 Years rr_AverageAnnualReturnYear10 7.93%
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Aggressive Portfolio | Russell 3000 Index (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 16.42%
5 Years rr_AverageAnnualReturnYear05 2.04%
10 Years rr_AverageAnnualReturnYear10 7.68%
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Aggressive Portfolio | Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 4.21%
5 Years rr_AverageAnnualReturnYear05 5.95%
10 Years rr_AverageAnnualReturnYear10 5.18%
COLUMBIA FUNDS SERIES TRUST | Columbia Capital Allocation Moderate Aggressive Portfolio | S&P 500 Index (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 16.00%
5 Years rr_AverageAnnualReturnYear05 1.66%
10 Years rr_AverageAnnualReturnYear10 7.10%
Columbia Funds Series Trust II | Columbia Capital Allocation Conservative Portfolio
  
Risk/Return: rr_RiskReturnAbstract  
Supplement [Text Block] cfst_SupplementTextBlock
Supplement dated June 28, 2013
to the Prospectus of the following funds:
Fund Prospectus Dated
Columbia Funds Series Trust  
 Columbia Capital Allocation Moderate Aggressive Portfolio 06/01/2013
 Columbia Capital Allocation Moderate Conservative Portfolio 06/01/2013
Columbia Funds Series Trust II  
 Columbia Capital Allocation Aggressive Portfolio 06/01/2013
 Columbia Capital Allocation Conservative Portfolio 06/01/2013
 Columbia Capital Allocation Moderate Portfolio 06/01/2013
(each a “Fund,” together the “Funds”)  
For Columbia Capital Allocation Conservative Portfolio
The “Average Annual Total Return” table within the section of the Fund’s Summary entitled “Performance Information” is deleted in its entirety and replaced with the following:
Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)
  Share Class
Inception Date 		1 Year 5 Years Life of Fund
Class A 03/04/2004      
returns before taxes   3.69% 3.34% 4.14%
returns after taxes on distributions   2.45% 2.26% 2.93%
returns after taxes on distributions and sale of Fund shares   2.72% 2.28% 2.91%
Class B returns before taxes 03/04/2004 3.08% 3.20% 3.92%
Class C returns before taxes 03/04/2004 7.05% 3.59% 3.93%
Class K returns before taxes 03/04/2004 9.04% 4.49% 4.88%
Class R returns before taxes 09/27/2010 8.59% 4.14% 4.50%
Class Z returns before taxes 09/27/2010 9.01% 4.46% 4.78%
Blended Index (66% Barclays U.S. Aggregate Bond Index, 15% Russell 3000 Index, 10% Citigroup 3-Month T-Bill Index, 5% MSCI EAFE Index (unhedged net) and 4% Barclays High Yield Corporate Bond Index) (reflects no deduction for fees, expenses or taxes)   6.76% 4.85% 5.20% (a)
Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)   4.21% 5.95% 5.20%
Russell 3000 Index (reflects no deduction for fees, expenses or taxes)   16.42% 2.04% 4.93%
 
(a) As of February 29, 2004.
On June 20, 2013, the Fund altered the composition of its Blended Index. This change was made based on a recommendation by the Fund’s Investment Manager to the Fund’s Board that the new Blended Index provides a more appropriate Fund performance comparison than the prior blended index.
The Citigroup 3-Month U.S. Treasury Bill Index and the MSCI EAFE Index (Gross) are no longer included as standalone benchmarks for Fund performance comparison purposes.
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)
Performance Table Market Index Changed rr_PerformanceTableMarketIndexChanged On June 20, 2013, the Fund altered the composition of its Blended Index. This change was made based on a recommendation by the Fund’s Investment Manager to the Fund’s Board that the new Blended Index provides a more appropriate Fund performance comparison than the prior blended index.

The Citigroup 3-Month U.S. Treasury Bill Index and the MSCI EAFE Index (Gross) are no longer included as standalone benchmarks for Fund performance comparison purposes.
Columbia Funds Series Trust II | Columbia Capital Allocation Conservative Portfolio | Class A
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 3.69%
5 Years rr_AverageAnnualReturnYear05 3.34%
Life of Fund rr_AverageAnnualReturnSinceInception 4.14%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Mar. 04, 2004
Columbia Funds Series Trust II | Columbia Capital Allocation Conservative Portfolio | Class B
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 3.08%
5 Years rr_AverageAnnualReturnYear05 3.20%
Life of Fund rr_AverageAnnualReturnSinceInception 3.92%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Mar. 04, 2004
Columbia Funds Series Trust II | Columbia Capital Allocation Conservative Portfolio | Class C
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 7.05%
5 Years rr_AverageAnnualReturnYear05 3.59%
Life of Fund rr_AverageAnnualReturnSinceInception 3.93%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Mar. 04, 2004
Columbia Funds Series Trust II | Columbia Capital Allocation Conservative Portfolio | Class K
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 9.04%
5 Years rr_AverageAnnualReturnYear05 4.49%
Life of Fund rr_AverageAnnualReturnSinceInception 4.88%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Mar. 04, 2004
Columbia Funds Series Trust II | Columbia Capital Allocation Conservative Portfolio | Class R
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 8.59%
5 Years rr_AverageAnnualReturnYear05 4.14%
Life of Fund rr_AverageAnnualReturnSinceInception 4.50%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Sep. 27, 2010
Columbia Funds Series Trust II | Columbia Capital Allocation Conservative Portfolio | Class Z
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 9.01%
5 Years rr_AverageAnnualReturnYear05 4.46%
Life of Fund rr_AverageAnnualReturnSinceInception 4.78%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Sep. 27, 2010
Columbia Funds Series Trust II | Columbia Capital Allocation Conservative Portfolio | returns after taxes on distributions | Class A
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 2.45%
5 Years rr_AverageAnnualReturnYear05 2.26%
Life of Fund rr_AverageAnnualReturnSinceInception 2.93%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Mar. 04, 2004
Columbia Funds Series Trust II | Columbia Capital Allocation Conservative Portfolio | returns after taxes on distributions and sale of Fund shares | Class A
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 2.72%
5 Years rr_AverageAnnualReturnYear05 2.28%
Life of Fund rr_AverageAnnualReturnSinceInception 2.91%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Mar. 04, 2004
Columbia Funds Series Trust II | Columbia Capital Allocation Conservative Portfolio | Blended Index (66% Barclays U.S. Aggregate Bond Index, 15% Russell 3000 Index, 10% Citigroup 3-Month T-Bill Index, 5% MSCI EAFE Index (unhedged net) and 4% Barclays High Yield Corporate Bond Index) (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 6.76%
5 Years rr_AverageAnnualReturnYear05 4.85%
Life of Fund rr_AverageAnnualReturnSinceInception 5.20% [1]
Columbia Funds Series Trust II | Columbia Capital Allocation Conservative Portfolio | Russell 3000 Index (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 16.42%
5 Years rr_AverageAnnualReturnYear05 2.04%
Life of Fund rr_AverageAnnualReturnSinceInception 4.93%
Columbia Funds Series Trust II | Columbia Capital Allocation Conservative Portfolio | Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 4.21%
5 Years rr_AverageAnnualReturnYear05 5.95%
Life of Fund rr_AverageAnnualReturnSinceInception 5.20%
Columbia Funds Series Trust II | Columbia Capital Allocation Moderate Portfolio
  
Risk/Return: rr_RiskReturnAbstract  
Supplement [Text Block] cfst_SupplementTextBlock
Supplement dated June 28, 2013
to the Prospectus of the following funds:
Fund Prospectus Dated
Columbia Funds Series Trust  
 Columbia Capital Allocation Moderate Aggressive Portfolio 06/01/2013
 Columbia Capital Allocation Moderate Conservative Portfolio 06/01/2013
Columbia Funds Series Trust II  
 Columbia Capital Allocation Aggressive Portfolio 06/01/2013
 Columbia Capital Allocation Conservative Portfolio 06/01/2013
 Columbia Capital Allocation Moderate Portfolio 06/01/2013
(each a “Fund,” together the “Funds”)  
For Columbia Capital Allocation Moderate Portfolio
The “Average Annual Total Return” table within the section of the Fund’s Summary entitled “Performance Information” is deleted in its entirety and replaced with the following:
Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)
  Share Class
Inception Date 		1 Year 5 Years Life of Fund
Class A 03/04/2004      
returns before taxes   5.46% 2.49% 4.87%
returns after taxes on distributions   4.68% 1.64% 3.71%
returns after taxes on distributions and sale of Fund shares   3.72% 1.63% 3.60%
Class B returns before taxes 03/04/2004 6.05% 2.57% 4.78%
Class C returns before taxes 03/04/2004 10.01% 2.93% 4.79%
Class K returns before taxes 03/04/2004 12.01% 3.89% 5.79%
Class R returns before taxes 09/27/2010 11.62% 3.47% 5.33%
Class Z returns before taxes 09/27/2010 12.05% 3.83% 5.64%
Blended Index (42.5% Barclays U.S. Aggregate Bond Index, 37% Russell 3000 Index, 11% MSCI EAFE Index (unhedged net), 7.5% Barclays High Yield Corporate Bond Index and 2% MSCI Emerging Markets Index (net)) (reflects no deduction for fees, expenses or taxes)   11.41% 4.17% 5.87%
Russell 3000 Index (reflects no deduction for fees, expenses or taxes)   16.42% 2.04% 4.93%
Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)   4.21% 5.95% 5.20%
 
On June 20, 2013, the Fund altered the composition of its Blended Index. This change was made based on a recommendation by the Fund’s Investment Manager to the Fund’s Board that the new Blended Index provides a more appropriate Fund performance comparison than the prior blended index.
The MSCI EAFE Index (Gross) is no longer included as a standalone benchmark for Fund performance comparison purposes.
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)
Performance Table Market Index Changed rr_PerformanceTableMarketIndexChanged On June 20, 2013, the Fund altered the composition of its Blended Index. This change was made based on a recommendation by the Fund’s Investment Manager to the Fund’s Board that the new Blended Index provides a more appropriate Fund performance comparison than the prior blended index.

The MSCI EAFE Index (Gross) is no longer included as a standalone benchmark for Fund performance comparison purposes.
Columbia Funds Series Trust II | Columbia Capital Allocation Moderate Portfolio | Class A
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 5.46%
5 Years rr_AverageAnnualReturnYear05 2.49%
Life of Fund rr_AverageAnnualReturnSinceInception 4.87%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Mar. 04, 2004
Columbia Funds Series Trust II | Columbia Capital Allocation Moderate Portfolio | Class B
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 6.05%
5 Years rr_AverageAnnualReturnYear05 2.57%
Life of Fund rr_AverageAnnualReturnSinceInception 4.78%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Mar. 04, 2004
Columbia Funds Series Trust II | Columbia Capital Allocation Moderate Portfolio | Class C
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 10.01%
5 Years rr_AverageAnnualReturnYear05 2.93%
Life of Fund rr_AverageAnnualReturnSinceInception 4.79%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Mar. 04, 2004
Columbia Funds Series Trust II | Columbia Capital Allocation Moderate Portfolio | Class K
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 12.01%
5 Years rr_AverageAnnualReturnYear05 3.89%
Life of Fund rr_AverageAnnualReturnSinceInception 5.79%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Mar. 04, 2004
Columbia Funds Series Trust II | Columbia Capital Allocation Moderate Portfolio | Class R
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 11.62%
5 Years rr_AverageAnnualReturnYear05 3.47%
Life of Fund rr_AverageAnnualReturnSinceInception 5.33%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Sep. 27, 2010
Columbia Funds Series Trust II | Columbia Capital Allocation Moderate Portfolio | Class Z
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 12.05%
5 Years rr_AverageAnnualReturnYear05 3.83%
Life of Fund rr_AverageAnnualReturnSinceInception 5.64%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Sep. 27, 2010
Columbia Funds Series Trust II | Columbia Capital Allocation Moderate Portfolio | returns after taxes on distributions | Class A
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 4.68%
5 Years rr_AverageAnnualReturnYear05 1.64%
Life of Fund rr_AverageAnnualReturnSinceInception 3.71%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Mar. 04, 2004
Columbia Funds Series Trust II | Columbia Capital Allocation Moderate Portfolio | returns after taxes on distributions and sale of Fund shares | Class A
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 3.72%
5 Years rr_AverageAnnualReturnYear05 1.63%
Life of Fund rr_AverageAnnualReturnSinceInception 3.60%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Mar. 04, 2004
Columbia Funds Series Trust II | Columbia Capital Allocation Moderate Portfolio | Blended Index (42.5% Barclays U.S. Aggregate Bond Index, 37% Russell 3000 Index, 11% MSCI EAFE Index (unhedged net), 7.5% Barclays High Yield Corporate Bond Index and 2% MSCI Emerging Markets Index (net)) (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 11.41%
5 Years rr_AverageAnnualReturnYear05 4.17%
Life of Fund rr_AverageAnnualReturnSinceInception 5.87%
Columbia Funds Series Trust II | Columbia Capital Allocation Moderate Portfolio | Russell 3000 Index (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 16.42%
5 Years rr_AverageAnnualReturnYear05 2.04%
Life of Fund rr_AverageAnnualReturnSinceInception 4.93%
Columbia Funds Series Trust II | Columbia Capital Allocation Moderate Portfolio | Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 4.21%
5 Years rr_AverageAnnualReturnYear05 5.95%
Life of Fund rr_AverageAnnualReturnSinceInception 5.20%
Columbia Funds Series Trust II | Columbia Capital Allocation Aggressive Portfolio
  
Risk/Return: rr_RiskReturnAbstract  
Supplement [Text Block] cfst_SupplementTextBlock
Supplement dated June 28, 2013
to the Prospectus of the following funds:
Fund Prospectus Dated
Columbia Funds Series Trust  
 Columbia Capital Allocation Moderate Aggressive Portfolio 06/01/2013
 Columbia Capital Allocation Moderate Conservative Portfolio 06/01/2013
Columbia Funds Series Trust II  
 Columbia Capital Allocation Aggressive Portfolio 06/01/2013
 Columbia Capital Allocation Conservative Portfolio 06/01/2013
 Columbia Capital Allocation Moderate Portfolio 06/01/2013
(each a “Fund,” together the “Funds”)  
For Columbia Capital Allocation Aggressive Portfolio
The “Average Annual Total Return” table within the section of the Fund’s Summary entitled “Performance Information” is deleted in its entirety and replaced with the following:
Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)
  Share Class
Inception Date 		1 Year 5 Years Life of Fund
Class A 03/04/2004      
returns before taxes   7.98% 0.28% 4.32%
returns after taxes on distributions   7.72% -0.17% 3.39%
returns after taxes on distributions and sale of Fund shares   5.48% 0.01% 3.35%
Class B returns before taxes 03/04/2004 8.70% 0.31% 4.22%
Class C returns before taxes 03/04/2004 12.75% 0.72% 4.22%
Class K returns before taxes 03/04/2004 14.64% 1.68% 5.22%
Class R returns before taxes 09/27/2010 14.27% 1.27% 4.80%
Class Z returns before taxes 09/27/2010 14.88% 1.62% 5.10%
Blended Index (60% Russell 3000 Index, 15% Barclays U.S. Aggregate Bond Index, 14% MSCI EAFE Index (unhedged net), 6% MSCI Emerging Markets Index (net) and 5% Barclays High Yield Corporate Bond Index) (reflects no deduction for fees, expenses or taxes)   14.91% 2.43% 5.87%
Russell 3000 Index (reflects no deduction for fees, expenses or taxes)   16.42% 2.04% 4.93%
Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)   4.21% 5.95% 5.20%
 
On June 20, 2013, the Fund altered the composition of its Blended Index. This change was made based on a recommendation by the Fund’s Investment Manager to the Fund’s Board that the new Blended Index provides a more appropriate Fund performance comparison than the prior blended index.
The MSCI EAFE Index (Gross) is no longer included as a standalone benchmark for Fund performance comparison purposes.
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2012)
Performance Table Market Index Changed rr_PerformanceTableMarketIndexChanged On June 20, 2013, the Fund altered the composition of its Blended Index. This change was made based on a recommendation by the Fund’s Investment Manager to the Fund’s Board that the new Blended Index provides a more appropriate Fund performance comparison than the prior blended index.

The MSCI EAFE Index (Gross) is no longer included as a standalone benchmark for Fund performance comparison purposes.
Columbia Funds Series Trust II | Columbia Capital Allocation Aggressive Portfolio | Class A
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 7.98%
5 Years rr_AverageAnnualReturnYear05 0.28%
Life of Fund rr_AverageAnnualReturnSinceInception 4.32%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Mar. 04, 2004
Columbia Funds Series Trust II | Columbia Capital Allocation Aggressive Portfolio | Class B
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 8.70%
5 Years rr_AverageAnnualReturnYear05 0.31%
Life of Fund rr_AverageAnnualReturnSinceInception 4.22%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Mar. 04, 2004
Columbia Funds Series Trust II | Columbia Capital Allocation Aggressive Portfolio | Class C
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 12.75%
5 Years rr_AverageAnnualReturnYear05 0.72%
Life of Fund rr_AverageAnnualReturnSinceInception 4.22%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Mar. 04, 2004
Columbia Funds Series Trust II | Columbia Capital Allocation Aggressive Portfolio | Class K
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 14.64%
5 Years rr_AverageAnnualReturnYear05 1.68%
Life of Fund rr_AverageAnnualReturnSinceInception 5.22%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Mar. 04, 2004
Columbia Funds Series Trust II | Columbia Capital Allocation Aggressive Portfolio | Class R
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 14.27%
5 Years rr_AverageAnnualReturnYear05 1.27%
Life of Fund rr_AverageAnnualReturnSinceInception 4.80%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Sep. 27, 2010
Columbia Funds Series Trust II | Columbia Capital Allocation Aggressive Portfolio | Class Z
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 14.88%
5 Years rr_AverageAnnualReturnYear05 1.62%
Life of Fund rr_AverageAnnualReturnSinceInception 5.10%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Sep. 27, 2010
Columbia Funds Series Trust II | Columbia Capital Allocation Aggressive Portfolio | returns after taxes on distributions | Class A
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 7.72%
5 Years rr_AverageAnnualReturnYear05 (0.17%)
Life of Fund rr_AverageAnnualReturnSinceInception 3.39%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Mar. 04, 2004
Columbia Funds Series Trust II | Columbia Capital Allocation Aggressive Portfolio | returns after taxes on distributions and sale of Fund shares | Class A
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 5.48%
5 Years rr_AverageAnnualReturnYear05 0.01%
Life of Fund rr_AverageAnnualReturnSinceInception 3.35%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Mar. 04, 2004
Columbia Funds Series Trust II | Columbia Capital Allocation Aggressive Portfolio | Blended Index (60% Russell 3000 Index, 15% Barclays U.S. Aggregate Bond Index, 14% MSCI EAFE Index (unhedged net), 6% MSCI Emerging Markets Index (net) and 5% Barclays High Yield Corporate Bond Index) (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 14.91%
5 Years rr_AverageAnnualReturnYear05 2.43%
Life of Fund rr_AverageAnnualReturnSinceInception 5.87%
Columbia Funds Series Trust II | Columbia Capital Allocation Aggressive Portfolio | Russell 3000 Index (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 16.42%
5 Years rr_AverageAnnualReturnYear05 2.04%
Life of Fund rr_AverageAnnualReturnSinceInception 4.93%
Columbia Funds Series Trust II | Columbia Capital Allocation Aggressive Portfolio | Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 4.21%
5 Years rr_AverageAnnualReturnYear05 5.95%
Life of Fund rr_AverageAnnualReturnSinceInception 5.20%
[1] a) As of February 29, 2004.