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Institutional [Member] Investment Objectives and Goals - Institutional - BlackRock China A Opportunities Fund
Oct. 31, 2025
Prospectus [Line Items]  
Risk/Return [Heading] Fund OverviewKey Facts About BlackRock China A Opportunities Fund
Objective [Heading] Investment Objective
Objective, Primary [Text Block]
The investment objective of BlackRock China A Opportunities Fund (the “Fund”), a series of BlackRock FundsSM (the “Trust”), is to seek to maximize total return. Total return means the combination of capital appreciation and investment income.