XML 81 R196.htm IDEA: XBRL DOCUMENT v3.19.1
Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName ALGER FUNDS
Prospectus Date rr_ProspectusDate Mar. 01, 2019
Document Creation Date dei_DocumentCreationDate Feb. 27, 2019