v3.26.1
S000069532 [Member] Average Annual Total Returns
12 Months Ended 60 Months Ended 63 Months Ended
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% 15.64%
S&P 500 Sustainability Screened Index (Returns do not reflect deductions for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Percent 17.50% 14.35% 16.38%
iShares ESG Select Screened S&P 500 ETF      
Prospectus [Line Items]      
Average Annual Return, Percent 17.40% 14.26% 16.26%
Performance Inception Date     Sep. 22, 2020
iShares ESG Select Screened S&P 500 ETF | After Taxes on Distributions      
Prospectus [Line Items]      
Average Annual Return, Percent 17.11% 13.94% 15.94%
iShares ESG Select Screened S&P 500 ETF | After Taxes on Distributions and Sales      
Prospectus [Line Items]      
Average Annual Return, Percent 10.47% 11.39% 13.12%