v3.26.1
Investment Objectives and Goals - Circle Reserve Fund
Apr. 30, 2026
Prospectus [Line Items]  
Risk/Return [Heading] Fund Overview Key Facts About Circle Reserve Fund
Objective [Heading] Investment Objective
Objective, Primary [Text Block]
The investment objective of Circle Reserve Fund (the “Fund”), a series of BlackRock FundsSM (the “Trust”), is to seek current income as is consistent with liquidity and stability of principal.