v3.26.1
S000004352 [Member] Average Annual Total Returns
 12 Months Ended 60 Months Ended 120 Months Ended 298 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
S&P Total Market Index (Returns do not reflect deductions for fees, expenses or taxes)        
Prospectus [Line Items]        
Average Annual Return, Percent 17.05% 13.07% 14.22%  
S&P North American Expanded Technology Sector Index (Spliced) (Returns do not reflect deductions for fees, expenses or taxes)        
Prospectus [Line Items]        
Average Annual Return, Percent [1] 27.31% 18.05% 22.57%  
iShares Expanded Tech Sector ETF        
Prospectus [Line Items]        
Average Annual Return, Percent 26.83% 17.60% 22.06%  
Performance Inception Date       Mar. 13, 2001
iShares Expanded Tech Sector ETF | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Percent 26.77% 17.52% 21.93%  
iShares Expanded Tech Sector ETF | After Taxes on Distributions and Sales        
Prospectus [Line Items]        
Average Annual Return, Percent 15.91% 14.28% 19.20%  
[1] The S&P North American Expanded Technology Sector Index (Spliced) reflects the performance of the S&P North American Technology Sector Index through December 23, 2018 and the S&P North American Expanded Technology Sector Index thereafter, which reflect the times when each index was the Underlying Index of the Fund.