S000013931 [Member] Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended | 218 Months Ended |
|---|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2024 |
Dec. 31, 2024 |
Dec. 31, 2024 |
|
| MSCI USA Index (Returns do not reflect deductions for fees, expenses or taxes) | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 25.08% | 14.56% | 13.08% | |
| MSCI KLD 400 Social Index (Returns do not reflect deductions for fees, expenses or taxes) | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 22.80% | 14.61% | 13.08% | |
| iShares ESG MSCI KLD 400 ETF | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 22.48% | 14.35% | 12.72% | |
| Performance Inception Date | Nov. 14, 2006 | |||
| iShares ESG MSCI KLD 400 ETF | After Taxes on Distributions | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 22.18% | 14.00% | 12.35% | |
| iShares ESG MSCI KLD 400 ETF | After Taxes on Distributions and Sales | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 13.52% | 11.47% | 10.53% |