Investor A Institutional and Class R [Member] Shareholder Fees - Investor A Institutional and Class R [Member] - BLACKROCK ADVANTAGE SMALL CAP GROWTH FUND	Sep. 30, 2025
INSTITUTIONAL
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price)	0.00%
INVESTOR A
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	5.25%
Maximum Deferred Sales Charge (as a percentage of Offering Price)	0.00%	[1]
Class R Shares
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price)	0.00%

[1] A contingent deferred sales charge (“CDSC”) of 1.00% is assessed on certain redemptions of Investor A Shares made within 18 months after purchase where no initial sales charge was paid at the time of purchase as part of an investment of $1,000,000 or more.