v3.25.2
Investor A C Institutional and Class R [Member] Expense Example, No Redemption - Investor A, C, Institutional and Class R - BlackRock Advantage SMID Cap Fund, Inc. - Investor C Shares
Mar. 31, 2025
USD ($)
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year $ 151
Expense Example, No Redemption, 3 Years 512
Expense Example, No Redemption, 5 Years 943
Expense Example, No Redemption, 10 Years $ 1,917