INSTITUTIONALINVESTOR Aand INVESTORC [Member] Investment Objectives and Goals - Investor A, C and Institutional - BLACKROCK WEALTH LIQUID ENVIRONMENTALLY AWARE FUND |
Mar. 31, 2025 |
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| Prospectus [Line Items] | |
| Risk/Return [Heading] | Fund Overview |
| Objective [Heading] | Investment Objective |
| Objective, Primary [Text Block] | The investment objective of BlackRock Wealth Liquid Environmentally Aware Fund (“WeLEAF” or the “Fund”), a series of BlackRock FundsSM (the “Trust”), is to seek as high a level of current income as is consistent with liquidity and preservation of capital while giving consideration to select environmental criteria.
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