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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Entity Registrant Name dei_EntityRegistrantName HARTFORD MUTUAL FUNDS II INC
Entity Central Index Key dei_EntityCentralIndexKey 0000049905
Document Creation Date dei_DocumentCreationDate May 07, 2015
Document Effective Date dei_DocumentEffectiveDate May 07, 2015
Prospectus Date rr_ProspectusDate Mar. 01, 2015