Class K [Member] Investment Objectives and Goals - Class K - BlackRock Sustainable Aware Advantage Large Cap Core Fund |
May 31, 2026 |
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| Prospectus [Line Items] | |
| Risk/Return [Heading] | Fund OverviewKey Facts About BlackRock Sustainable Aware Advantage Large Cap Core Fund |
| Objective [Heading] | Investment Objective |
| Objective, Primary [Text Block] | The investment objective of BlackRock Sustainable Aware Advantage Large Cap Core Fund (the “Fund”), a series of BlackRock FundsSM (the “Trust”), is to seek to provide total return while seeking to maintain certain environmental, social and governance (“ESG”) characteristics and climate risk exposure relative to the Fund’s benchmark.
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