v3.26.3
InvestorAC Institutional And ClassR [Member] Expense Example, No Redemption - Investor A, C, Institutional and Class R - BLACKROCK BALANCED FUND, INC. - Investor C Shares
May 31, 2026
USD ($)
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year $ 159
Expense Example, No Redemption, 3 Years 495
Expense Example, No Redemption, 5 Years 854
Expense Example, No Redemption, 10 Years $ 1,662