XML 17 R12.htm IDEA: XBRL DOCUMENT v2.4.0.6
Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName JANUS INVESTMENT FUND
Prospectus Date rr_ProspectusDate Apr. 01, 2013
Document Creation Date dei_DocumentCreationDate Mar. 29, 2013