v3.26.1
S000004439 [Member] Investment Objectives and Goals - iShares Micro-Cap ETF
Mar. 31, 2026
Prospectus [Line Items]  
Risk/Return [Heading] iShares Micro-Cap ETFIWC | NYSE Arca
Objective [Heading] Investment Objective
Objective, Primary [Text Block]
The iShares Micro-Cap ETF (the Fund) seeks to track the investment results of an index composed of micro-capitalization U.S. equities.