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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Document Type dei_DocumentType Other
Document Period End Date dei_DocumentPeriodEndDate Jul. 21, 2011
Registrant Name dei_EntityRegistrantName Columbia Funds Series Trust II
Central Index Key dei_EntityCentralIndexKey 0001352280
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Sep. 22, 2011
Document Effective Date dei_DocumentEffectiveDate Sep. 22, 2011
Prospectus Date rr_ProspectusDate Jul. 28, 2011
Columbia Flexible Capital Income Fund | Class A, C, I, R and W
  
Risk/Return: rr_RiskReturnAbstract  
Supplement [Text Block] cfst1352280_SupplementTextBlock
Supplement dated September 22, 2011 to the Prospectus listed below
 
      
Fund Prospectus Material Number Effective Date
Columbia Flexible Capital Income Fund (Class A, C, I, R, W)           S-6609-99 A (7/11)     July 28, 2011
 
The first paragraph under the caption “Fees and Expenses of the Fund” in the Summary of the Fund is hereby revised and replaced as follows:
 
This 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 and Columbia Acorn funds. More information about these and other discounts is available from your financial intermediary and under “Reductions/Waivers of Sales Charges — Front-End Sales Charge Reductions” on page S.10 of this prospectus and on page 44 in the Fund’s Statement of Additional Information (SAI).