v3.26.1
S000093347 [Member] Investment Objectives and Goals - iShares S&P 500 ex S&P 100 ETF
Mar. 31, 2026
Prospectus [Line Items]  
Risk/Return [Heading] iShares S&P 500 ex S&P 100 ETF XOEF | NYSE Arca
Objective [Heading] Investment Objective
Objective, Primary [Text Block]
The iShares S&P 500 ex S&P 100 ETF (the Fund) seeks to track the investment results of an index composed of the large capitalization U.S. equities within the S&P 500 Index excluding companies within the S&P 100 Index.