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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Entity Registrant Name dei_EntityRegistrantName SEQUOIA FUND INC
Entity Central Index Key dei_EntityCentralIndexKey 0000089043
Document Creation Date dei_DocumentCreationDate Apr. 28, 2014
Document Effective Date dei_DocumentEffectiveDate Apr. 28, 2014
Prospectus Date rr_ProspectusDate May 01, 2014