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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Document Type dei_DocumentType Other
Document Period End Date dei_DocumentPeriodEndDate Mar. 31, 2012
Registrant Name dei_EntityRegistrantName COLUMBIA FUNDS SERIES TRUST I
Central Index Key dei_EntityCentralIndexKey 0000773757
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Jan. 30, 2013
Document Effective Date dei_DocumentEffectiveDate Jan. 30, 2013
Prospectus Date rr_ProspectusDate Jan. 30, 2013
Supplement Text Block columbia_SupplementTextBlock

COLUMBIA FUNDS SERIES TRUST I

Columbia Pacific/Asia Fund
(the "Fund")

Supplement dated January 30, 2013 to the
Fund's prospectuses dated August 1, 2012, as supplemented
(Columbia Pacific/Asia Fund)
  
Risk/Return: rr_RiskReturnAbstract  
Strategy Supplement - Text Block columbia_SupplementTextBlock_01

Effective immediately, the second paragraph of the section of the prospectuses for the Fund entitled "Principal Investment Strategies" is deleted in its entirety and replaced with the following disclosure:
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Fund may invest in currency forwards and futures for both hedging and non-hedging purposes, including, for example, to seek to enhance returns or, in certain unusual circumstances, when holding a derivative is deemed preferable to holding the underlying asset.