v3.26.1
S000004328 [Member] Average Annual Total Returns
12 Months Ended 60 Months Ended 120 Months Ended 307 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%  
Dow Jones U.S. Real Estate Capped Index (Spliced) (Returns do not reflect deductions for fees, expenses or taxes)        
Prospectus [Line Items]        
Average Annual Return, Percent [1] 3.76% 4.94% 5.83%  
iShares U.S. Real Estate ETF        
Prospectus [Line Items]        
Average Annual Return, Percent 3.38% 4.55% 5.45%  
Performance Inception Date       Jun. 12, 2000
iShares U.S. Real Estate ETF | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Percent 2.54% 3.62% 4.26%  
iShares U.S. Real Estate ETF | After Taxes on Distributions and Sales        
Prospectus [Line Items]        
Average Annual Return, Percent 2.19% 3.21% 3.81%  
[1] The Dow Jones U.S. Real Estate Capped Index (Spliced) reflects the performance of the Dow Jones U.S. Real Estate Index through January 24, 2021 and the Dow Jones U.S. Real Estate Capped Index thereafter, which reflect the times when each index was the Underlying Index of the Fund.