Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

COLUMBIA FUNDS SERIES TRUST I

Prospectus Date

rr_ProspectusDate

Jan. 01, 2013

Supplement [Text Block]

cfst1_SupplementTextBlock

Supplement dated October 29, 2013

to the Prospectus of the following fund:

Fund Prospectus Dated

Columbia Funds Series Trust I

Active Portfolios^® Multi-Manager Alternative Strategies Fund              1/1/2013, as supplemented

(the "Fund")

Effective on or about November 25, 2013, all references to Eaton Vance Management (Eaton Vance) as investment subadviser to the Fund, including references to the Eaton Vance Sleeve - Global Macro Advantage Strategy, are hereby removed.

Active Portfolios Multi-Manager Alternative Strategies Fund

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

cfst1_SupplementTextBlock

Supplement dated October 29, 2013

to the Prospectus of the following fund:

Fund Prospectus Dated

Columbia Funds Series Trust I

Active Portfolios^® Multi-Manager Alternative Strategies Fund              1/1/2013, as supplemented

(the "Fund")

Effective on or about November 25, 2013, all references to Eaton Vance Management (Eaton Vance) as investment subadviser to the Fund, including references to the Eaton Vance Sleeve - Global Macro Advantage Strategy, are hereby removed.