Class K [Member] Investment Objectives and Goals - Class K - BlackRock Defensive Advantage Emerging Markets Fund |
Apr. 30, 2025 |
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| Prospectus [Line Items] | |
| Risk/Return [Heading] | Fund Overview Key Facts About BlackRock Defensive Advantage Emerging Markets Fund |
| Objective [Heading] | Investment Objective |
| Objective, Primary [Text Block] | The investment objective of BlackRock Defensive Advantage Emerging Markets Fund (the “Fund”), a series of BlackRock FundsSM (the “Trust”), is to seek to provide long-term capital appreciation.
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