XML 13 R8.htm IDEA: XBRL DOCUMENT v3.5.0.1
Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName BLACKROCK FUNDS
Prospectus Date rr_ProspectusDate Mar. 25, 2016
Document Creation Date dei_DocumentCreationDate Jun. 17, 2016