Investor A C Institutional Class R [Member] Investment Objectives and Goals - Investor A, C, Institutional and Class R - BLACKROCK CAPITAL APPRECIATION FUND, INC. |
May 31, 2025 |
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| Prospectus [Line Items] | |
| Risk/Return [Heading] | Fund OverviewKey Facts About BlackRock Capital Appreciation Fund, Inc. |
| Objective [Heading] | Investment Objective |
| Objective, Primary [Text Block] | The investment objective of BlackRock Capital Appreciation Fund, Inc. (the “Fund”) is to seek long-term growth of capital.
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