v3.26.1
Investor A C and Institutional [Member] Investment Objectives and Goals - Investor A C and Institutional - BLACKROCK LARGE CAP FOCUS GROWTH FUND, INC.
May 31, 2025
Prospectus [Line Items]  
Risk/Return [Heading] Fund Overview Key Facts About BlackRock Large Cap Focus Growth Fund, Inc.
Objective [Heading] Investment Objective
Objective, Primary [Text Block]
The investment objective of the BlackRock Large Cap Focus Growth Fund, Inc. (the “Fund”) is long-term capital appreciation.