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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Document Type dei_DocumentType Other
Document Period End Date dei_DocumentPeriodEndDate Mar. 31, 2011
Registrant Name dei_EntityRegistrantName COLUMBIA FUNDS SERIES TRUST
Central Index Key dei_EntityCentralIndexKey 0001097519
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Dec. 08, 2011
Document Effective Date dei_DocumentEffectiveDate Dec. 08, 2011
Prospectus Date rr_ProspectusDate Dec. 08, 2011
Supplement Text Block columbia_SupplementTextBlock
COLUMBIA FUNDS SERIES TRUST

Columbia LifeGoal® Growth Portfolio
Columbia LifeGoal® Balanced Growth Portfolio
Columbia LifeGoal® Income and Growth Portfolio
(each a "Fund" and collectively the "Funds")

Supplement dated December 8, 2011 to the Funds' prospectus dated August 1, 2011
offering Class A, B, C, R, R4 and T shares, as applicable, as supplemented

The prospectus for the Funds is revised and supplemented as follows:

(Columbia LifeGoal Portfolios - Classes ABCR R4 T) | (Columbia LifeGoal® Growth Portfolio)
  
Risk/Return: rr_RiskReturnAbstract  
Supplement Text Block columbia_SupplementTextBlock

Performance Information

The section entitled "Columbia LifeGoal® Growth Portfolio - Performance Information" is modified by deleting the first paragraph of the section and replacing it with the following:
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. Class R4 shares commenced operations on March 7, 2011; therefore, calendar year performance information for this class is not yet available. The average annual total return table includes the returns of the Fund's Class A shares (without applicable sales charges). Class R4 shares would have annual returns substantially similar to those of Class A shares (without applicable sales charges), because each of the Fund's share classes is invested in the same portfolio of securities, and its returns would differ only to the extent that its expenses differ. The returns shown for Class A shares have not been adjusted to reflect any differences in expenses between Class R4 shares and Class A shares. The returns shown for Class R shares include the returns of the Fund's Class A shares (without applicable sales charges) for the periods prior to January 23, 2006, the date Class R shares commenced operations. The returns shown do not reflect any differences in expenses. If differences in expenses had been reflected, the returns shown for Class R shares would be lower. The Fund's past performance (before or after taxes) is no guarantee of how the Fund will perform in the future.

Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund's past performance (before or after taxes) is no guarantee of how the Fund will perform in the future.
(Columbia LifeGoal Portfolios - Classes ABCR R4 T) | (Columbia LifeGoal® Balanced Growth Portfolio)
  
Risk/Return: rr_RiskReturnAbstract  
Supplement Text Block columbia_SupplementTextBlock

Performance Information

The section entitled "Columbia LifeGoal® Balanced Growth Portfolio - Performance Information" is modified by deleting the first paragraph of the section and replacing it with the following:
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. Class T shares commenced operations on March 7, 2011; therefore, calendar year performance information for this class is not yet available. The average annual total return table includes the returns of the Fund's Class A shares. Class T shares would have annual returns substantially similar to those of Class A shares because each of the Fund's share classes is invested in the same portfolio of securities, and its returns would differ only to the extent that its expenses differ. The returns shown for Class A shares have not been adjusted to reflect any differences in expenses between Class T shares and Class A shares. If differences in expenses had been reflected, the returns shown for Class T shares would be lower. The returns shown for Class R shares include the returns of the Fund's Class A shares (without applicable sales charges) for the periods prior to January 23, 2006, the date Class R shares commenced operations. The returns shown do not reflect any differences in expenses. If differences in expenses had been reflected, the returns shown for Class R shares would be lower. The Fund's past performance (before or after taxes) is no guarantee of how the Fund will perform in the future.

Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund's past performance (before or after taxes) is no guarantee of how the Fund will perform in the future.
(Columbia LifeGoal Portfolios - Classes ABCR R4 T) | (Columbia LifeGoal® Income and Growth Portfolio)
  
Risk/Return: rr_RiskReturnAbstract  
Supplement Text Block columbia_SupplementTextBlock

Performance Information

The section entitled "Columbia LifeGoal® Income and Growth Portfolio - Performance Information" is modified by deleting the first paragraph of the section and replacing it with the following:
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The returns shown for Class R shares include the returns of the Fund's Class A shares (without applicable sales charges) for the periods prior to January 23, 2006, the date Class R shares commenced operations. The returns shown do not reflect any differences in expenses. If differences in expenses had been reflected, the returns shown for Class R shares would be lower. The Fund's past performance (before or after taxes) is no guarantee of how the Fund will perform in the future.

Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund's past performance (before or after taxes) is no guarantee of how the Fund will perform in the future.
(Columbia LifeGoal Portfolios - Classes ABCR R4 T) | (Columbia LifeGoal® Income Portfolio)
  
Risk/Return: rr_RiskReturnAbstract  
Supplement Text Block columbia_SupplementTextBlock
COLUMBIA FUNDS SERIES TRUST

Columbia LifeGoal® Income Portfolio
(the "Fund")

Supplement dated December 8, 2011 to
the Fund's prospectuses dated August 1, 2011, as supplemented

Fees and Expenses of the Fund

The section of the Fund's prospectus offering Class A, Class B and Class C entitled "Columbia LifeGoal® Income Portfolio - Fees and Expenses of the Fund" is modified by deleting the table and related footnotes to the table entitled "Annual Fund Operating Expenses" and the expense example table in the subsection entitled "Example" and replacing them with the following:
Operating Expenses Caption [Text] rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Expense Example [Heading] rr_ExpenseExampleHeading

Example

(Columbia LifeGoal Portfolios - Classes ABCR R4 T) | (Columbia LifeGoal® Income Portfolio) | Class A
  
Risk/Return: rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.07% [1],[2]
Distribution and/or service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.65% [3]
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.58%
Total annual Fund operating expenses rr_ExpensesOverAssets 1.55%
Fee waivers and/or reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.41%) [4]
Total annual Fund operating expenses after fee waivers and/or reimbursements rr_NetExpensesOverAssets 1.14% [6]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 437
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 760
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,105
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,077
(Columbia LifeGoal Portfolios - Classes ABCR R4 T) | (Columbia LifeGoal® Income Portfolio) | Class B
  
Risk/Return: rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.07% [1],[2]
Distribution and/or service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other expenses rr_OtherExpensesOverAssets 0.65% [3]
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.58%
Total annual Fund operating expenses rr_ExpensesOverAssets 2.30%
Fee waivers and/or reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.41%) [4]
Total annual Fund operating expenses after fee waivers and/or reimbursements rr_NetExpensesOverAssets 1.89% [6]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 492
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 879
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,193
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,416
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 192
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 679
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,193
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 2,416
(Columbia LifeGoal Portfolios - Classes ABCR R4 T) | (Columbia LifeGoal® Income Portfolio) | Class C
  
Risk/Return: rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.07% [1],[2]
Distribution and/or service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other expenses rr_OtherExpensesOverAssets 0.65% [3]
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.58%
Total annual Fund operating expenses rr_ExpensesOverAssets 2.30%
Fee waivers and/or reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.41%) [4]
Total annual Fund operating expenses after fee waivers and/or reimbursements rr_NetExpensesOverAssets 1.89% [6]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 292
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 679
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,193
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,604
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 192
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 679
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,193
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 2,604
(Columbia LifeGoal Portfolios - Class Z) | (Columbia LifeGoal® Income Portfolio)
  
Risk/Return: rr_RiskReturnAbstract  
Supplement [Text Block] columbia_SupplementTextBlock_02
The section of the Fund's prospectus offering Class Z shares entitled "Columbia LifeGoal® Income Portfolio - Fees and Expenses of the Fund" is modified by deleting the table and related footnotes to the table entitled "Annual Fund Operating Expenses" and the expense example table in the subsection entitled "Example" and replacing them with the following:
Operating Expenses Caption [Text] rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Expense Example [Heading] rr_ExpenseExampleHeading

Example

(Columbia LifeGoal Portfolios - Class Z) | (Columbia LifeGoal® Income Portfolio) | Class Z
  
Risk/Return: rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.07% [1],[2]
Distribution and/or service (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.65% [3]
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.58%
Total annual Fund operating expenses rr_ExpensesOverAssets 1.30%
Fee waivers and/or reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.41%) [5]
Total annual Fund operating expenses after fee waivers and/or reimbursements rr_NetExpensesOverAssets 0.89% [6]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 91
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 372
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 674
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,532
(Columbia Small Cap Value Fund II - Classes ABCIR) | (Columbia Small Cap Value Fund II)
  
Risk/Return: rr_RiskReturnAbstract  
Supplement Text Block columbia_SupplementTextBlock
COLUMBIA FUNDS SERIES TRUST

Columbia Small Cap Value Fund II
(the "Fund")

Supplement dated December 8, 2011 to the Fund's prospectus
dated July 1, 2011 offering Class A, B, C, I and R shares, as supplemented

The prospectus for the Fund is revised and supplemented as follows:

Performance Information

The section entitled "Columbia Small Cap Value Fund II - Performance Information" is modified by deleting the first paragraph of the section and replacing it with the following:
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The returns shown for Class R shares include the returns of the Fund's Class A shares (without applicable sales charges) for periods prior to January 23, 2006, the date on which Class R shares commenced operations. The returns shown for Class I shares include the returns of the Fund's Class Z shares, which are not offered in this prospectus, for periods prior to September 27, 2010, the date Class I shares commenced operations. The returns shown have not been adjusted to reflect any differences in expenses. If differences in expenses had been reflected, the returns shown for Class R shares would be lower. The Fund's past performance (before or after taxes) is no guarantee of how the Fund will perform in the future.

Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund's past performance (before or after taxes) is no guarantee of how the Fund will perform in the future.
[1] Management fees are composed of an investment advisory fee of 0.05% and an administration fee of 0.02%. The Adviser has implemented a schedule for the Fund's investment advisory fees whereby the Fund pays (i) 0.00% on its assets that are invested in funds that pay an investment advisory fee to the Adviser; (ii) 0.40% on its assets invested in securities (other than third party advised mutual funds and funds that pay an investment advisory fee to the Adviser), including other funds advised by the Adviser that do not pay an investment advisory fee, exchange-traded funds, derivatives and individual securities; and (iii) 0.10% on its assets that are invested in non-exchange traded third party funds.
[2] Management fees have been restated to reflect contractual changes to the investment advisory and/or administrative fee rates.
[3] Other expenses have been restated to reflect contractual changes to the fees paid by the Fund.
[4] Columbia Management Investment Advisers, LLC (the Adviser) and certain of its affiliates have contractually agreed to waive fees and/or to reimburse expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses, investment advisory fees and extraordinary expenses) until July 31, 2012, unless sooner terminated at the sole discretion of the Fund's Board of Trustees. Under this agreement, the Fund's net operating expenses will not exceed the annual rates of 0.51% for Class A, 1.26% for Class B and 1.26% for Class C.
[5] Columbia Management Investment Advisers, LLC (the Adviser) and certain of its affiliates have contractually agreed to waive fees and/or to reimburse expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses, investment advisory fees and extraordinary expenses) until July 31, 2012, unless sooner terminated at the sole discretion of the Fund's Board of Trustees. Under this agreement, the Fund's net operating expenses will not exceed the annual rate of 0.26% for Class Z.
[6] "Total annual Fund operating expenses" do not match "Net Expenses" in the Financial Highlights section of this prospectus, which does not include, among other things, fees and expenses incurred as a result of investment in shares of certain pooled investment vehicles.