v3.25.2
Class K [Member] Expense Example - Class K - BlackRock Advantage SMID Cap Fund, Inc. - Class K Shares
Mar. 31, 2025
USD ($)
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 44
Expense Example, with Redemption, 3 Years 165
Expense Example, with Redemption, 5 Years 324
Expense Example, with Redemption, 10 Years $ 788