v3.25.2
INSTITUTIONALINVESTOR Aand INVESTORC [Member] N-1A Cover
Mar. 31, 2025
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 Mar. 31, 2025
Prospectus Date Jul. 29, 2025