XML 31 R90.htm IDEA: XBRL DOCUMENT v2.4.1.9
Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName NUVEEN INVESTMENT FUNDS INC
Prospectus Date rr_ProspectusDate Feb. 27, 2015
Document Creation Date dei_DocumentCreationDate Feb. 27, 2015