v3.26.3
Investor A C Institutional and Class R [Member] Investment Objectives and Goals - Investor A, C, Institutional and Class R - BLACKROCK ADVANTAGE INTERNATIONAL FUND
May 31, 2026
Prospectus [Line Items]  
Risk/Return [Heading] Fund OverviewKey Facts About BlackRock Advantage International Fund
Objective [Heading] Investment Objective
Objective, Primary [Text Block]
The investment objective of BlackRock Advantage International Fund (the “Fund”), a series of BlackRock FundsSM (the “Trust”), is to provide long-term capital appreciation.