S000013931 [Member] Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended | 230 Months Ended |
|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| MSCI USA Index (Returns do not reflect deductions for fees, expenses or taxes) | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 17.75% | 13.87% | 14.79% | |
| MSCI KLD 400 Social Index (Returns do not reflect deductions for fees, expenses or taxes) | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 18.23% | 14.06% | 14.89% | |
| iShares ESG MSCI KLD 400 ETF | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 17.93% | 13.80% | 14.54% | |
| Performance Inception Date | Nov. 14, 2006 | |||
| iShares ESG MSCI KLD 400 ETF | After Taxes on Distributions | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 17.65% | 13.48% | 14.18% | |
| iShares ESG MSCI KLD 400 ETF | After Taxes on Distributions and Sales | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 10.78% | 11.01% | 12.17% |