Investor A C Institutional And Class R [Member] Investment Objectives and Goals - Investor A C Institutional And Class R - BLACKROCK MID CAP GROWTH EQUITY PORTFOLIO

May 31, 2025

Prospectus [Line Items]

Risk/Return [Heading]

Fund Overview Key Facts About BlackRock Mid-Cap Growth Equity Portfolio

Objective [Heading]

Investment Objective

Objective, Primary [Text Block]

The investment objective of BlackRock Mid-Cap Growth Equity Portfolio (“Mid-Cap Growth Equity”or the “Fund”), a series of BlackRock FundsSM (the “Trust”), is long-term capital appreciation.