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, 2026 |
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| 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.
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