v3.26.1
S000004355 [Member] Average Annual Total Returns
 12 Months Ended 60 Months Ended 120 Months Ended 294 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 Software Index (Spliced) (Returns do not reflect deductions for fees, expenses or taxes)        
Prospectus [Line Items]        
Average Annual Return, Percent [1] 6.00% 8.66% 18.25%  
iShares Expanded Tech-Software Sector ETF        
Prospectus [Line Items]        
Average Annual Return, Percent 5.62% 8.35% 17.90%  
Performance Inception Date       Jul. 10, 2001
iShares Expanded Tech-Software Sector ETF | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Percent 5.62% 8.35% 17.85%  
iShares Expanded Tech-Software Sector ETF | After Taxes on Distributions and Sales        
Prospectus [Line Items]        
Average Annual Return, Percent 3.32% 6.59% 15.38%  
[1] The S&P North American Expanded Technology Software Index (Spliced) reflects the performance of the S&P North American Technology Software Index through December 23, 2018 and the S&P North American Expanded Technology Software Index thereafer, which reflect the times when each index was the Underlying Index of the Fund.