v3.26.1
Investor A C Institutional And Class R [Member] Expense Example - Investor A, C, Institutional and Class R - BlackRock Mid-Cap Value Fund
Apr. 30, 2026
USD ($)
Investor A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 622
Expense Example, with Redemption, 3 Years 845
Expense Example, with Redemption, 5 Years 1,086
Expense Example, with Redemption, 10 Years 1,776
Investor C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 278
Expense Example, with Redemption, 3 Years 585
Expense Example, with Redemption, 5 Years 1,017
Expense Example, with Redemption, 10 Years 2,006
Institutional  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 77
Expense Example, with Redemption, 3 Years 261
Expense Example, with Redemption, 5 Years 462
Expense Example, with Redemption, 10 Years 1,040
Class R  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 127
Expense Example, with Redemption, 3 Years 433
Expense Example, with Redemption, 5 Years 760
Expense Example, with Redemption, 10 Years $ 1,687