v3.25.1
Investor A Institutional [Member] N-1A Cover
Oct. 31, 2024
Prospectus [Line Items]  
Document Type 485BPOS
Amendment Flag false
Registrant Name BlackRock Funds
Entity Central Index Key 0000844779
Entity Investment Company Type N-1A
Document Period End Date Oct. 31, 2024
Prospectus Date Jun. 12, 2025