v3.25.2
Class K [Member] Investment Objectives and Goals - Class K - BlackRock Advantage SMID Cap Fund, Inc.
Mar. 31, 2025
Prospectus [Line Items]  
Risk/Return [Heading] Fund OverviewKey Facts About BlackRock Advantage SMID Cap Fund, Inc.
Objective [Heading] Investment Objective
Objective, Primary [Text Block]
The investment objective of BlackRock Advantage SMID Cap Fund, Inc. (the “Fund”) is to seek long-term capital appreciation.