v3.26.3
Investor A C and Institutional [Member] Expense Example, No Redemption - Investor A, C and Institutional - BLACKROCK LARGE CAP FOCUS GROWTH FUND, INC. - Investor C
May 31, 2026
USD ($)
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year $ 170
Expense Example, No Redemption, 3 Years 547
Expense Example, No Redemption, 5 Years 950
Expense Example, No Redemption, 10 Years $ 1,867