| Form N-CSR Cover | 6 Months Ended |
| Oct. 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | iShares Trust |
| Entity Central Index Key | 0001100663 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Oct. 31, 2024 |
| Shareholder Report | 6 Months Ended |
| Oct. 31, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | iShares Trust |
| Entity Central Index Key | 0001100663 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Oct. 31, 2024 |
| C000012060 | |
| Shareholder Report [Line Items] | |
| Fund Name | iShares Dow Jones U.S. ETF |
| Trading Symbol | IYY |
| Security Exchange Name | NYSEArca |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about iShares Dow Jones U.S. ETF (the “Fund”) for the period of May 1, 2024 to October 31, 2024 |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at blackrock.com/fundreports |
| Additional Information Phone Number | 1-800-474-2737 |
| Additional Information Website | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span>" id="sjs-B19"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span> |
| Expenses [Text Block] | What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Fund name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment iShares Dow Jones U.S. ETF $11 0.20% Footnote Reference ⁽ᵃ⁾ Annualized. |
| Expenses Paid, Amount | $ 11 |
| Expense Ratio, Percent | 0.20% |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Average Annual Return [Table Text Block] | Average annual total returns ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6-Month Total Returns 1 Year 5 Years 10 Years Fund NAV ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 13.76 % 37.86 % 14.58 % 12.38 % S&P Total Market Index ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 13.84 37.99 14.51 12.37 Dow Jones U.S. Index™ ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 13.87 38.10 14.79 12.58 The Fund has added the S&P Total Market Index in response to new regulatory requirements. |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| AssetsNet | $ 2,211,565,744 |
| Holdings Count | Holding | 1,030 |
| InvestmentCompanyPortfolioTurnover | 2% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ $2,211,565,744 Number of Portfolio Holdings ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1,030 Portfolio Turnover Rate ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2% |
| Holdings [Text Block] | Sector allocation Sector Percent of Total Investments Footnote Reference Information Technology ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 30.5 % Financials ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 13.8 Health Care ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 11.0 Consumer Discretionary ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 10.2 Industrials ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 9.4 Communication Services ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 8.7 Consumer Staples ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 5.5 Energy ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.4 Real Estate ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.5 Materials ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.5 Utilities ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.5 |
| Largest Holdings [Text Block] | Ten largest holdings Security Percent of Total Investments Footnote Reference Apple, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6.5 % NVIDIA Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6.2 Microsoft Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 5.7 Amazon.com, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.3 Meta Platforms, Inc., Class A ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.3 Alphabet, Inc., Class A ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1.9 Alphabet, Inc., Class C, NVS ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1.6 Berkshire Hathaway, Inc., Class B ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1.6 Broadcom, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1.5 Tesla, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1.3 |
| C000038163 | |
| Shareholder Report [Line Items] | |
| Fund Name | iShares MSCI KLD 400 Social ETF |
| Trading Symbol | DSI |
| Security Exchange Name | NYSEArca |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about iShares MSCI KLD 400 Social ETF (the “Fund”) for the period of May 1, 2024 to October 31, 2024 |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at blackrock.com/fundreports |
| Additional Information Phone Number | 1-800-474-2737 |
| Additional Information Website | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span>" id="sjs-B41"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span> |
| Expenses [Text Block] | What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Fund name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment iShares MSCI KLD 400 Social ETF $13 0.25% Footnote Reference ⁽ᵃ⁾ Annualized. |
| Expenses Paid, Amount | $ 13 |
| Expense Ratio, Percent | 0.25% |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Average Annual Return [Table Text Block] | Average annual total returns ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6-Month Total Returns 1 Year 5 Years 10 Years Fund NAV ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 12.70 % 37.85 % 15.24 % 12.69 % MSCI USA Index ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 14.11 38.40 15.27 12.95 MSCI KLD 400 Social Index ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 12.84 38.07 15.50 13.06 The Fund has added the MSCI USA Index in response to new regulatory requirements. |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| AssetsNet | $ 4,696,097,626 |
| Holdings Count | Holding | 405 |
| InvestmentCompanyPortfolioTurnover | 1% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ $4,696,097,626 Number of Portfolio Holdings ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 405 Portfolio Turnover Rate ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1% |
| Holdings [Text Block] | Sector allocation Sector Percent of Total Investments Footnote Reference Information Technology ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 37.7 % Financials ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 12.3 Health Care ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 9.1 Industrials ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 9.0 Consumer Discretionary ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 9.0 Communication Services ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 8.8 Consumer Staples ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 5.9 Real Estate ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.0 Materials ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.8 Energy ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1.4 Utilities ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1.0 |
| Largest Holdings [Text Block] | Ten largest holdings Security Percent of Total Investments Footnote Reference NVIDIA Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 12.4 % Microsoft Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 10.9 Alphabet, Inc., Class A ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.8 Alphabet, Inc., Class C, NVS ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.3 Tesla, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.7 Visa, Inc., Class A ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1.7 Mastercard, Inc., Class A ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1.6 Home Depot, Inc. (The) ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1.5 Procter & Gamble Co. (The) ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1.5 AbbVie, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1.4 |
| C000012199 | |
| Shareholder Report [Line Items] | |
| Fund Name | iShares MSCI USA ESG Select ETF |
| Trading Symbol | SUSA |
| Security Exchange Name | NYSEArca |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about iShares MSCI USA ESG Select ETF (the “Fund”) for the period of May 1, 2024 to October 31, 2024 |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at blackrock.com/fundreports |
| Additional Information Phone Number | 1-800-474-2737 |
| Additional Information Website | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span>" id="sjs-B63"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span> |
| Expenses [Text Block] | What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Fund name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment iShares MSCI USA ESG Select ETF $13 0.25% Footnote Reference ⁽ᵃ⁾ Annualized. |
| Expenses Paid, Amount | $ 13 |
| Expense Ratio, Percent | 0.25% |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Average Annual Return [Table Text Block] | Average annual total returns ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6-Month Total Returns 1 Year 5 Years 10 Years Fund NAV ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 13.75 % 37.84 % 14.97 % 12.55 % MSCI USA Index ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 14.11 38.40 15.27 12.95 MSCI USA Extended ESG Select Index ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 13.90 38.10 15.25 12.93 The Fund has added the MSCI USA Index in response to new regulatory requirements. |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| AssetsNet | $ 3,650,515,736 |
| Holdings Count | Holding | 178 |
| InvestmentCompanyPortfolioTurnover | 9% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ $3,650,515,736 Number of Portfolio Holdings ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 178 Portfolio Turnover Rate ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 9% |
| Holdings [Text Block] | Sector allocation Sector Percent of Total Investments Footnote Reference Information Technology ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 34.0 % Industrials ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 11.9 Health Care ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 11.5 Financials ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 10.2 Consumer Staples ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 8.4 Consumer Discretionary ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 7.1 Communication Services ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6.2 Energy ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.9 Materials ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.4 Real Estate ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.6 Utilities ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 0.8 |
| Largest Holdings [Text Block] | Ten largest holdings Security Percent of Total Investments Footnote Reference NVIDIA Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 5.1 % Apple, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.9 Microsoft Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.7 Alphabet, Inc., Class A ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.0 Alphabet, Inc., Class C, NVS ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1.9 Coca-Cola Co. (The) ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1.8 Home Depot, Inc. (The) ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1.7 Broadcom, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1.7 Eli Lilly & Co. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1.5 Kellanova ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1.4 |
| C000012048 | |
| Shareholder Report [Line Items] | |
| Fund Name | iShares U.S. Basic Materials ETF |
| Trading Symbol | IYM |
| Security Exchange Name | NYSEArca |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about iShares U.S. Basic Materials ETF (the “Fund”) for the period of May 1, 2024 to October 31, 2024 |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at blackrock.com/fundreports |
| Additional Information Phone Number | 1-800-474-2737 |
| Additional Information Website | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span>" id="sjs-B85"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span> |
| Expenses [Text Block] | What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Fund name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment iShares U.S. Basic Materials ETF $20 0.38% Footnote Reference ⁽ᵃ⁾ Annualized. |
| Expenses Paid, Amount | $ 20 |
| Expense Ratio, Percent | 0.38% |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Average Annual Return [Table Text Block] | Average annual total returns ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6-Month Total Returns 1 Year 5 Years 10 Years Fund NAV ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.96 % 20.93 % 11.56 % 7.57 % Russell 3000 ® ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 13.85 37.86 14.60 12.44 Russell 1000 Basic Materials RIC 22.5/45 Capped Index ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.15 21.39 11.99 7.99 The Fund has added the Russell 3000 ® |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| AssetsNet | $ 567,474,517 |
| Holdings Count | Holding | 39 |
| InvestmentCompanyPortfolioTurnover | 10% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ $567,474,517 Number of Portfolio Holdings ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 39 Portfolio Turnover Rate ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 10% |
| Holdings [Text Block] | Industry allocation Industry Percent of Total Investments Footnote Reference Chemicals ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 59.0 % Metals & Mining ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 28.2 Containers & Packaging ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 5.7 Trading Companies & Distributors ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.1 Machinery ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.2 Aerospace & Defense ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 0.8 |
| Largest Holdings [Text Block] | Ten largest holdings Security Percent of Total Investments Footnote Reference Linde PLC ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 21.3 % Air Products and Chemicals, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 8.2 Freeport-McMoRan, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 7.6 Ecolab, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 7.3 Fastenal Co. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.1 Newmont Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.9 Nucor Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.4 Steel Dynamics, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.2 International Paper Co. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.1 International Flavors & Fragrances, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.0 |
| C000012050 | |
| Shareholder Report [Line Items] | |
| Fund Name | iShares U.S. Consumer Discretionary ETF |
| Trading Symbol | IYC |
| Security Exchange Name | NYSEArca |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about iShares U.S. Consumer Discretionary ETF (the “Fund”) for the period of May 1, 2024 to October 31, 2024 |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at blackrock.com/fundreports |
| Additional Information Phone Number | 1-800-474-2737 |
| Additional Information Website | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span>" id="sjs-B107"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span> |
| Expenses [Text Block] | What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Fund name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment iShares U.S. Consumer Discretionary ETF $20 0.38% Footnote Reference ⁽ᵃ⁾ Annualized. |
| Expenses Paid, Amount | $ 20 |
| Expense Ratio, Percent | 0.38% |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Average Annual Return [Table Text Block] | Average annual total returns ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6-Month Total Returns 1 Year 5 Years 10 Years Fund NAV ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 12.60 % 35.79 % 10.40 % 11.48 % Russell 3000 ® ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 13.85 37.86 14.60 12.44 Russell 1000 Consumer Discretionary 40 Act 15/22.5 Daily Capped Index ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 12.80 36.28 10.81 11.93 The Fund has added the Russell 3000 ® |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| AssetsNet | $ 1,024,354,022 |
| Holdings Count | Holding | 179 |
| InvestmentCompanyPortfolioTurnover | 12% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ $1,024,354,022 Number of Portfolio Holdings ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 179 Portfolio Turnover Rate ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 12% |
| Holdings [Text Block] | Industry allocation Industry Percent of Total Investments Footnote Reference Consumer Discretionary Distribution & Retail ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 32.5 % Consumer Services ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 19.1 Media & Entertainment ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 13.6 Automobiles & Components ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 10.5 Consumer Staples Distribution & Retail ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 10.3 Consumer Durables & Apparel ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 7.9 Transportation ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.4 Commercial & Professional Services ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1.2 Household & Personal Products ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 0.4 Capital Goods ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 0.1 |
| Largest Holdings [Text Block] | Ten largest holdings Security Percent of Total Investments Footnote Reference Amazon.com, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 14.5 % Tesla, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 7.9 Home Depot, Inc. (The) ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.4 Netflix, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.3 Walmart, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.2 Costco Wholesale Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.2 McDonald's Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.6 Walt Disney Co. (The) ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.0 Booking Holdings, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.7 Lowe's Companies, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.6 |
| C000012194 | |
| Shareholder Report [Line Items] | |
| Fund Name | iShares U.S. Consumer Staples ETF |
| Trading Symbol | IYK |
| Security Exchange Name | NYSEArca |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about iShares U.S. Consumer Staples ETF (the “Fund”) for the period of May 1, 2024 to October 31, 2024 |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at blackrock.com/fundreports |
| Additional Information Phone Number | 1-800-474-2737 |
| Additional Information Website | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span>" id="sjs-B129"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span> |
| Expenses [Text Block] | What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Fund name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment iShares U.S. Consumer Staples ETF $19 0.38% Footnote Reference ⁽ᵃ⁾ Annualized. |
| Expenses Paid, Amount | $ 19 |
| Expense Ratio, Percent | 0.38% |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Average Annual Return [Table Text Block] | Average annual total returns ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6-Month Total Returns 1 Year 5 Years 10 Years Fund NAV ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.50 % 14.59 % 12.45 % 9.62 % Russell 3000 ® ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 13.85 37.86 14.60 12.44 Russell 1000 Consumer Staples RIC 22.5/45 Capped Index ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.70 15.03 12.91 10.07 The Fund has added the Russell 3000 ® |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| AssetsNet | $ 1,307,826,155 |
| Holdings Count | Holding | 58 |
| InvestmentCompanyPortfolioTurnover | 6% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ $1,307,826,155 Number of Portfolio Holdings ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 58 Portfolio Turnover Rate ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6% |
| Holdings [Text Block] | Industry allocation Industry Percent of Total Investments Footnote Reference Food, Beverage & Tobacco ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 57.3 % Household & Personal Products ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 26.4 Health Care Equipment & Services ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 8.1 Consumer Staples Distribution & Retail ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6.2 Materials ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.0 |
| Largest Holdings [Text Block] | Ten largest holdings Security Percent of Total Investments Footnote Reference Procter & Gamble Co. (The) ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 15.9 % Coca-Cola Co. (The) ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 10.5 PepsiCo, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 9.5 Philip Morris International, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 8.7 Altria Group, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.4 Mondelez International, Inc., Class A ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.3 Colgate-Palmolive Co. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.6 CVS Health Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.3 McKesson Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.1 Kimberly-Clark Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.1 |
| C000012051 | |
| Shareholder Report [Line Items] | |
| Fund Name | iShares U.S. Energy ETF |
| Trading Symbol | IYE |
| Security Exchange Name | NYSEArca |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about iShares U.S. Energy ETF (the “Fund”) for the period of May 1, 2024 to October 31, 2024 |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at blackrock.com/fundreports |
| Additional Information Phone Number | 1-800-474-2737 |
| Additional Information Website | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span>" id="sjs-B151"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span> |
| Expenses [Text Block] | What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Fund name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment iShares U.S. Energy ETF $19 0.38% Footnote Reference ⁽ᵃ⁾ Annualized. |
| Expenses Paid, Amount | $ 19 |
| Expense Ratio, Percent | 0.38% |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Average Annual Return [Table Text Block] | Average annual total returns ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6-Month Total Returns 1 Year 5 Years 10 Years Fund NAV ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ (3.32 )% 7.01 % 13.22 % 2.90 % Russell 3000 ® ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 13.85 37.86 14.60 12.44 Russell 1000 Energy RIC 22.5/45 Capped Index ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ (3.13 ) 7.43 13.67 3.30 The Fund has added the Russell 3000 ® |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| AssetsNet | $ 1,246,930,127 |
| Holdings Count | Holding | 45 |
| InvestmentCompanyPortfolioTurnover | 8% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ $1,246,930,127 Number of Portfolio Holdings ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 45 Portfolio Turnover Rate ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 8% |
| Holdings [Text Block] | Industry allocation Industry Percent of Total Investments Footnote Reference Oil, Gas & Consumable Fuels ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 89.9 % Energy Equipment & Services ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 8.3 Semiconductors & Semiconductor Equipment ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1.8 |
| Largest Holdings [Text Block] | Ten largest holdings Security Percent of Total Investments Footnote Reference Exxon Mobil Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 22.7 % Chevron Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 14.9 ConocoPhillips ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 7.4 EOG Resources, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.1 Williams Companies, Inc. (The) ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.7 Schlumberger N.V. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.3 ONEOK, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.3 Marathon Petroleum Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.0 Phillips 66 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.0 Kinder Morgan, Inc., Class P ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.8 |
| C000012052 | |
| Shareholder Report [Line Items] | |
| Fund Name | iShares U.S. Financial Services ETF |
| Trading Symbol | IYG |
| Security Exchange Name | NYSEArca |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about iShares U.S. Financial Services ETF (the “Fund”) for the period of May 1, 2024 to October 31, 2024 |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at blackrock.com/fundreports |
| Additional Information Phone Number | 1-800-474-2737 |
| Additional Information Website | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span>" id="sjs-B173"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span> |
| Expenses [Text Block] | What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Fund name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment iShares U.S. Financial Services ETF $21 0.38% Footnote Reference ⁽ᵃ⁾ Annualized. |
| Expenses Paid, Amount | $ 21 |
| Expense Ratio, Percent | 0.38% |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Average Annual Return [Table Text Block] | Average annual total returns ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6-Month Total Returns 1 Year 5 Years 10 Years Fund NAV ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 16.80 % 50.49 % 11.38 % 11.38 % S&P Total Market Index ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 13.84 37.99 14.51 12.37 Dow Jones U.S. Financial Services Index™ ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 17.01 51.08 11.81 11.83 The Fund has added the S&P Total Market Index in response to new regulatory requirements. |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| AssetsNet | $ 1,473,614,680 |
| Holdings Count | Holding | 105 |
| InvestmentCompanyPortfolioTurnover | 2% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ $1,473,614,680 Number of Portfolio Holdings ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 105 Portfolio Turnover Rate ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2% |
| Holdings [Text Block] | Industry allocation Industry Percent of Total Investments Footnote Reference Financial Services ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 68.5 % Banks ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 31.5 |
| Largest Holdings [Text Block] | Ten largest holdings Security Percent of Total Investments Footnote Reference Berkshire Hathaway, Inc., Class B ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 14.5 % JPMorgan Chase & Co. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 11.1 Visa, Inc., Class A ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 8.5 Mastercard, Inc., Class A ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 7.2 Bank of America Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 5.0 Wells Fargo & Co. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.9 Goldman Sachs Group, Inc. (The) ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.9 S&P Global, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.7 American Express Co. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.7 Morgan Stanley ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.5 |
| C000012053 | |
| Shareholder Report [Line Items] | |
| Fund Name | iShares U.S. Financials ETF |
| Trading Symbol | IYF |
| Security Exchange Name | NYSEArca |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about iShares U.S. Financials ETF (the “Fund”) for the period of May 1, 2024 to October 31, 2024 |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at blackrock.com/fundreports |
| Additional Information Phone Number | 1-800-474-2737 |
| Additional Information Website | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span>" id="sjs-B195"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span> |
| Expenses [Text Block] | What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Fund name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment iShares U.S. Financials ETF $21 0.38% Footnote Reference ⁽ᵃ⁾ Annualized. |
| Expenses Paid, Amount | $ 21 |
| Expense Ratio, Percent | 0.38% |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Average Annual Return [Table Text Block] | Average annual total returns ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6-Month Total Returns 1 Year 5 Years 10 Years Fund NAV ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 17.91 % 49.38 % 12.17 % 11.29 % Russell 3000 ® ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 13.85 37.86 14.60 12.44 Russell 1000 Financials 40 Act 15/22.5 Daily Capped Index ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 18.13 49.99 12.63 11.74 The Fund has added the Russell 3000 ® |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| AssetsNet | $ 3,278,651,286 |
| Holdings Count | Holding | 141 |
| InvestmentCompanyPortfolioTurnover | 2% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ $3,278,651,286 Number of Portfolio Holdings ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 141 Portfolio Turnover Rate ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2% |
| Holdings [Text Block] | Industry allocation Industry Percent of Total Investments Footnote Reference Financial Services ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 47.4 % Banks ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 30.5 Insurance ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 21.7 Commercial & Professional Services ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 0.4 |
| Largest Holdings [Text Block] | Ten largest holdings Security Percent of Total Investments Footnote Reference Berkshire Hathaway, Inc., Class B ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 12.1 % JPMorgan Chase & Co. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 9.6 Bank of America Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.5 Wells Fargo & Co. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.1 Goldman Sachs Group, Inc. (The) ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.0 S&P Global, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.7 BlackRock, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.6 Progressive Corp. (The) ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.6 Morgan Stanley ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.4 Citigroup, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.2 |
| C000012054 | |
| Shareholder Report [Line Items] | |
| Fund Name | iShares U.S. Healthcare ETF |
| Trading Symbol | IYH |
| Security Exchange Name | NYSEArca |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about iShares U.S. Healthcare ETF (the “Fund”) for the period of May 1, 2024 to October 31, 2024 |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at blackrock.com/fundreports |
| Additional Information Phone Number | 1-800-474-2737 |
| Additional Information Website | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span>" id="sjs-B217"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span> |
| Expenses [Text Block] | What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Fund name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment iShares U.S. Healthcare ETF $20 0.38% Footnote Reference ⁽ᵃ⁾ Annualized. |
| Expenses Paid, Amount | $ 20 |
| Expense Ratio, Percent | 0.38% |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Average Annual Return [Table Text Block] | Average annual total returns ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6-Month Total Returns 1 Year 5 Years 10 Years Fund NAV ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6.18 % 20.77 % 10.69 % 9.62 % Russell 3000 ® ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 13.85 37.86 14.60 12.44 Russell 1000 Health Care RIC 22.5/45 Capped Index ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6.37 21.22 11.12 10.05 The Fund has added the Russell 3000 ® |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| AssetsNet | $ 3,305,990,724 |
| Holdings Count | Holding | 110 |
| InvestmentCompanyPortfolioTurnover | 3% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ $3,305,990,724 Number of Portfolio Holdings ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 110 Portfolio Turnover Rate ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3% |
| Holdings [Text Block] | Industry allocation Industry Percent of Total Investments Footnote Reference Pharmaceuticals ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 30.9 % Health Care Equipment & Supplies ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 21.1 Biotechnology ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 18.9 Health Care Providers & Services ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 17.6 Life Sciences Tools & Services ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 10.8 Health Care Technology ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 0.7 |
| Largest Holdings [Text Block] | Ten largest holdings Security Percent of Total Investments Footnote Reference Eli Lilly & Co. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 11.9 % UnitedHealth Group, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 9.3 Johnson & Johnson ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6.9 AbbVie, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6.5 Merck & Co., Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.6 Thermo Fisher Scientific, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.7 Abbott Laboratories ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.5 Intuitive Surgical, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.2 Amgen, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.1 Pfizer, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.9 |
| C000012055 | |
| Shareholder Report [Line Items] | |
| Fund Name | iShares U.S. Industrials ETF |
| Trading Symbol | IYJ |
| Security Exchange Name | CboeBZX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about iShares U.S. Industrials ETF (the “Fund”) for the period of May 1, 2024 to October 31, 2024 |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at blackrock.com/fundreports |
| Additional Information Phone Number | 1-800-474-2737 |
| Additional Information Website | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span>" id="sjs-B239"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span> |
| Expenses [Text Block] | What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Fund name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment iShares U.S. Industrials ETF $20 0.38% Footnote Reference ⁽ᵃ⁾ Annualized. |
| Expenses Paid, Amount | $ 20 |
| Expense Ratio, Percent | 0.38% |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Average Annual Return [Table Text Block] | Average annual total returns ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6-Month Total Returns 1 Year 5 Years 10 Years Fund NAV ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 11.31 % 38.22 % 11.86 % 11.16 % Russell 3000 ® ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 13.85 37.86 14.60 12.44 Russell 1000 Industrials 40 Act 15/22.5 Daily Capped Index ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 11.52 38.75 12.30 11.63 The Fund has added the Russell 3000 ® |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| AssetsNet | $ 1,537,927,026 |
| Holdings Count | Holding | 193 |
| InvestmentCompanyPortfolioTurnover | 3% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ $1,537,927,026 Number of Portfolio Holdings ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 193 Portfolio Turnover Rate ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3% |
| Holdings [Text Block] | Industry allocation Industry Percent of Total Investments Footnote Reference Capital Goods ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 48.4 % Financial Services ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 22.3 Transportation ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 8.6 Materials ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 7.5 Commercial & Professional Services ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6.7 Software & Services ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.0 Technology Hardware & Equipment ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1.6 Consumer Durables & Apparel ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 0.4 Pharmaceuticals, Biotechnology & Life Sciences ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 0.4 Semiconductors & Semiconductor Equipment ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 0.1 Other Footnote Reference ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 0.0 Footnote Reference |
| Largest Holdings [Text Block] | Ten largest holdings Security Percent of Total Investments Footnote Reference Visa, Inc., Class A ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6.9 % Mastercard, Inc., Class A ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6.2 Accenture PLC, Class A ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.2 General Electric Co ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.8 Caterpillar, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.8 RTX Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.4 American Express Co. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.3 Union Pacific Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.1 Honeywell International, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.0 Eaton Corp. PLC ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.0 |
| C000012059 | |
| Shareholder Report [Line Items] | |
| Fund Name | iShares U.S. Technology ETF |
| Trading Symbol | IYW |
| Security Exchange Name | NYSEArca |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about iShares U.S. Technology ETF (the “Fund”) for the period of May 1, 2024 to October 31, 2024 |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at blackrock.com/fundreports |
| Additional Information Phone Number | 1-800-474-2737 |
| Additional Information Website | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span>" id="sjs-B261"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span> |
| Expenses [Text Block] | What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Fund name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment iShares U.S. Technology ETF $21 0.38% Footnote Reference ⁽ᵃ⁾ Annualized. |
| Expenses Paid, Amount | $ 21 |
| Expense Ratio, Percent | 0.38% |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Average Annual Return [Table Text Block] | Average annual total returns ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6-Month Total Returns 1 Year 5 Years 10 Years Fund NAV ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 17.78 % 45.86 % 23.85 % 20.39 % Russell 3000 ® ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 13.85 37.86 14.60 12.44 Russell 1000 Technology RIC 22.5/45 Capped Index ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 18.03 46.28 24.31 20.89 The Fund has added the Russell 3000 ® |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| AssetsNet | $ 18,536,634,853 |
| Holdings Count | Holding | 144 |
| InvestmentCompanyPortfolioTurnover | 5% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ $18,536,634,853 Number of Portfolio Holdings ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 144 Portfolio Turnover Rate ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 5% |
| Holdings [Text Block] | Industry allocation Industry Percent of Total Investments Footnote Reference Software ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 34.1 % Semiconductors & Semiconductor Equipment ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 31.7 Technology Hardware, Storage & Peripherals ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 17.0 Interactive Media & Services ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 9.3 IT Services ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.1 Electronic Equipment, Instruments & Components ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1.6 Professional Services ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 1.0 Hotels, Restaurants & Leisure ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 0.5 Electrical Equipment ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 0.4 Communications Equipment ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 0.1 Other Footnote Reference ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 0.2 |
| Largest Holdings [Text Block] | Ten largest holdings Security Percent of Total Investments Footnote Reference Apple, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 15.5 % NVIDIA Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 14.8 Microsoft Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 14.3 Meta Platforms, Inc., Class A ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.1 Broadcom, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.4 Alphabet, Inc., Class A ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.7 Salesforce, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.4 Oracle Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.3 Alphabet, Inc., Class C, NVS ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.2 Advanced Micro Devices, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.1 |
| C000012061 | |
| Shareholder Report [Line Items] | |
| Fund Name | iShares U.S. Transportation ETF |
| Trading Symbol | IYT |
| Security Exchange Name | CboeBZX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about iShares U.S. Transportation ETF (the “Fund”) for the period of May 1, 2024 to October 31, 2024 |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at blackrock.com/fundreports |
| Additional Information Phone Number | 1-800-474-2737 |
| Additional Information Website | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span>" id="sjs-B283"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span> |
| Expenses [Text Block] | What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Fund name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment iShares U.S. Transportation ETF $20 0.38% Footnote Reference ⁽ᵃ⁾ Annualized. |
| Expenses Paid, Amount | $ 20 |
| Expense Ratio, Percent | 0.38% |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Average Annual Return [Table Text Block] | Average annual total returns ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6-Month Total Returns 1 Year 5 Years 10 Years Fund NAV ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 8.35 % 28.72 % 9.29 % 7.10 % S&P Total Market Index ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 13.84 37.99 14.51 12.37 S&P Transportation Select Industry FMC Capped Index ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 8.57 29.23 10.30 7.73 The Fund has added the S&P Total Market Index in response to new regulatory requirements. |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| AssetsNet | $ 647,757,785 |
| Holdings Count | Holding | 47 |
| InvestmentCompanyPortfolioTurnover | 5% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ $647,757,785 Number of Portfolio Holdings ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 47 Portfolio Turnover Rate ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 5% |
| Holdings [Text Block] | Industry allocation Industry Percent of Total Investments Footnote Reference Ground Transportation ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 61.1 % Air Freight & Logistics ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 19.6 Passenger Airlines ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 17.2 Marine Transportation ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.1 |
| Largest Holdings [Text Block] | Ten largest holdings Security Percent of Total Investments Footnote Reference Uber Technologies, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 17.4 % Union Pacific Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 16.3 United Parcel Service, Inc., Class B ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 8.6 Delta Air Lines, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 5.5 Old Dominion Freight Line, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.5 United Airlines Holdings, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.4 CSX Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.3 Norfolk Southern Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.2 FedEx Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.1 Southwest Airlines Co. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.1 |
| C000012062 | |
| Shareholder Report [Line Items] | |
| Fund Name | iShares U.S. Utilities ETF |
| Trading Symbol | IDU |
| Security Exchange Name | NYSEArca |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about iShares U.S. Utilities ETF (the “Fund”) for the period of May 1, 2024 to October 31, 2024 |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at blackrock.com/fundreports |
| Additional Information Phone Number | 1-800-474-2737 |
| Additional Information Website | <span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span>" id="sjs-B305"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: justify;">blackrock.com/fundreports</span></span> |
| Expenses [Text Block] | What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment) Fund name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment iShares U.S. Utilities ETF $21 0.38% Footnote Reference ⁽ᵃ⁾ Annualized. |
| Expenses Paid, Amount | $ 21 |
| Expense Ratio, Percent | 0.38% |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Average Annual Return [Table Text Block] | Average annual total returns ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6-Month Total Returns 1 Year 5 Years 10 Years Fund NAV ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 19.47 % 38.93 % 7.43 % 9.01 % Russell 3000 ® ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 13.85 37.86 14.60 12.44 Russell 1000 Utilities RIC 22.5/45 Capped Index ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 19.71 39.49 7.84 9.46 The Fund has added the Russell 3000 ® |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| AssetsNet | $ 1,456,367,908 |
| Holdings Count | Holding | 47 |
| InvestmentCompanyPortfolioTurnover | 2% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ $1,456,367,908 Number of Portfolio Holdings ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 47 Portfolio Turnover Rate ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2% |
| Holdings [Text Block] | Industry allocation Industry Percent of Total Investments Footnote Reference Electric Utilities ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 58.0 % Multi-Utilities ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 22.5 Commercial Services & Supplies ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 10.3 Independent Power and Renewable Electricity Producers ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 4.4 Water Utilities ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.6 Gas Utilities ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 2.2 |
| Largest Holdings [Text Block] | Ten largest holdings Security Percent of Total Investments Footnote Reference NextEra Energy, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 11.6 % Southern Co. (The) ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 7.1 Duke Energy Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6.3 Waste Management, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6.2 Constellation Energy Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 5.9 Sempra ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.8 American Electric Power Co., Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.7 Dominion Energy, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.5 Public Service Enterprise Group, Inc. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.2 PG&E Corp. ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3.1 |
| Shareholder Report, Line Graph (Details) | 6 Months Ended | 120 Months Ended |
| Oct. 31, 2024 | Oct. 31, 2024 | |
| S&P Total Market Index | ||
| Account Value [Line Items] | ||
| Line Graph and Table Measure Name | S&P Total Market Index | |
| MSCI USA Index | ||
| Account Value [Line Items] | ||
| Line Graph and Table Measure Name | MSCI USA Index | |
| MSCI USA Index | ||
| Account Value [Line Items] | ||
| Line Graph and Table Measure Name | MSCI USA Index | |
| S&P Total Market Index | ||
| Account Value [Line Items] | ||
| Line Graph and Table Measure Name | S&P Total Market Index | |
| S&P Total Market Index | ||
| Account Value [Line Items] | ||
| Line Graph and Table Measure Name | S&P Total Market Index | |
| MSCI KLD 400 Social Index | ||
| Account Value [Line Items] | ||
| Line Graph and Table Measure Name | MSCI KLD 400 Social Index | |
| MSCI USA Extended ESG Select Index | ||
| Account Value [Line Items] | ||
| Line Graph and Table Measure Name | MSCI USA Extended ESG Select Index | |
| Russell 1000 Basic Materials RIC 22.5/45 Capped Index | ||
| Account Value [Line Items] | ||
| Line Graph and Table Measure Name | Russell 1000 Basic Materials RIC 22.5/45 Capped Index | |
| Russell 1000 Consumer Discretionary RIC 22.5/45 Capped Index | ||
| Account Value [Line Items] | ||
| Line Graph and Table Measure Name | Russell 1000 Consumer Discretionary 40 Act 15/22.5 Daily Capped Index | |
| Russell 1000 Consumer Staples RIC 22.5/45 Capped Index | ||
| Account Value [Line Items] | ||
| Line Graph and Table Measure Name | Russell 1000 Consumer Staples RIC 22.5/45 Capped Index | |
| Russell 1000 Energy RIC 22.5/45 Capped Index | ||
| Account Value [Line Items] | ||
| Line Graph and Table Measure Name | Russell 1000 Energy RIC 22.5/45 Capped Index | |
| Russell 1000 Financials 40 Act 15/22.5 Daily Capped Index | ||
| Account Value [Line Items] | ||
| Line Graph and Table Measure Name | Russell 1000 Financials 40 Act 15/22.5 Daily Capped Index | |
| Russell 1000 Health Care RIC 22.5/45 Capped Index | ||
| Account Value [Line Items] | ||
| Line Graph and Table Measure Name | Russell 1000 Health Care RIC 22.5/45 Capped Index | |
| Russell 1000 Industrials 40 Act 15/22.5 Daily Capped Index | ||
| Account Value [Line Items] | ||
| Line Graph and Table Measure Name | Russell 1000 Industrials 40 Act 15/22.5 Daily Capped Index | |
| Russell 1000 Technology RIC 22.5/45 Capped Index | ||
| Account Value [Line Items] | ||
| Line Graph and Table Measure Name | Russell 1000 Technology RIC 22.5/45 Capped Index | |
| S&P Transportation Select Industry FMC Capped Index | ||
| Account Value [Line Items] | ||
| Line Graph and Table Measure Name | S&P Transportation Select Industry FMC Capped Index | |
| Russell 1000 Utilities RIC 22.5/45 Capped Index | ||
| Account Value [Line Items] | ||
| Line Graph and Table Measure Name | Russell 1000 Utilities RIC 22.5/45 Capped Index |
| Shareholder Report, Average Annual Return (Details) | 6 Months Ended | 12 Months Ended | 60 Months Ended | 120 Months Ended |
| Oct. 31, 2024 | Oct. 31, 2024 | Oct. 31, 2024 | Oct. 31, 2024 | |
| C000012060 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 13.76% | 37.86% | 14.58% | 12.38% |
| C000038163 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 12.70% | 37.85% | 15.24% | 12.69% |
| C000012199 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 13.75% | 37.84% | 14.97% | 12.55% |
| C000012048 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 3.96% | 20.93% | 11.56% | 7.57% |
| C000012050 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 12.60% | 35.79% | 10.40% | 11.48% |
| C000012194 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 3.50% | 14.59% | 12.45% | 9.62% |
| C000012051 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | (3.32%) | 7.01% | 13.22% | 2.90% |
| C000012052 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 16.80% | 50.49% | 11.38% | 11.38% |
| C000012053 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 17.91% | 49.38% | 12.17% | 11.29% |
| C000012054 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 6.18% | 20.77% | 10.69% | 9.62% |
| C000012055 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 11.31% | 38.22% | 11.86% | 11.16% |
| C000012059 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 17.78% | 45.86% | 23.85% | 20.39% |
| C000012061 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 8.35% | 28.72% | 9.29% | 7.10% |
| C000012062 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 19.47% | 38.93% | 7.43% | 9.01% |
| S&P Total Market Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | S&P Total Market Index | |||
| Average Annual Return, Percent | 13.84% | 37.99% | 14.51% | 12.37% |
| MSCI USA Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | MSCI USA Index | |||
| Average Annual Return, Percent | 14.11% | 38.40% | 15.27% | 12.95% |
| MSCI USA Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | MSCI USA Index | |||
| Average Annual Return, Percent | 14.11% | 38.40% | 15.27% | 12.95% |
| Russell 3000 Index | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 13.85% | 37.86% | 14.60% | 12.44% |
| Russell 3000 Index | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 13.85% | 37.86% | 14.60% | 12.44% |
| Russell 3000 Index | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 13.85% | 37.86% | 14.60% | 12.44% |
| Russell 3000 Index | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 13.85% | 37.86% | 14.60% | 12.44% |
| S&P Total Market Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | S&P Total Market Index | |||
| Average Annual Return, Percent | 13.84% | 37.99% | 14.51% | 12.37% |
| Russell 3000 Index | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 13.85% | 37.86% | 14.60% | 12.44% |
| Russell 3000 Index | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 13.85% | 37.86% | 14.60% | 12.44% |
| Russell 3000 Index | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 13.85% | 37.86% | 14.60% | 12.44% |
| Russell 3000 Index | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 13.85% | 37.86% | 14.60% | 12.44% |
| S&P Total Market Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | S&P Total Market Index | |||
| Average Annual Return, Percent | 13.84% | 37.99% | 14.51% | 12.37% |
| Russell 3000 Index | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 13.85% | 37.86% | 14.60% | 12.44% |
| Dow Jones U.S. Index | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 13.87% | 38.10% | 14.79% | 12.58% |
| MSCI KLD 400 Social Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | MSCI KLD 400 Social Index | |||
| Average Annual Return, Percent | 12.84% | 38.07% | 15.50% | 13.06% |
| MSCI USA Extended ESG Select Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | MSCI USA Extended ESG Select Index | |||
| Average Annual Return, Percent | 13.90% | 38.10% | 15.25% | 12.93% |
| Russell 1000 Basic Materials RIC 22.5/45 Capped Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Russell 1000 Basic Materials RIC 22.5/45 Capped Index | |||
| Average Annual Return, Percent | 4.15% | 21.39% | 11.99% | 7.99% |
| Russell 1000 Consumer Discretionary RIC 22.5/45 Capped Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Russell 1000 Consumer Discretionary 40 Act 15/22.5 Daily Capped Index | |||
| Average Annual Return, Percent | 12.80% | 36.28% | 10.81% | 11.93% |
| Russell 1000 Consumer Staples RIC 22.5/45 Capped Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Russell 1000 Consumer Staples RIC 22.5/45 Capped Index | |||
| Average Annual Return, Percent | 3.70% | 15.03% | 12.91% | 10.07% |
| Russell 1000 Energy RIC 22.5/45 Capped Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Russell 1000 Energy RIC 22.5/45 Capped Index | |||
| Average Annual Return, Percent | (3.13%) | 7.43% | 13.67% | 3.30% |
| Dow Jones U.S. Financial Services Index | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 17.01% | 51.08% | 11.81% | 11.83% |
| Russell 1000 Financials 40 Act 15/22.5 Daily Capped Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Russell 1000 Financials 40 Act 15/22.5 Daily Capped Index | |||
| Average Annual Return, Percent | 18.13% | 49.99% | 12.63% | 11.74% |
| Russell 1000 Health Care RIC 22.5/45 Capped Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Russell 1000 Health Care RIC 22.5/45 Capped Index | |||
| Average Annual Return, Percent | 6.37% | 21.22% | 11.12% | 10.05% |
| Russell 1000 Industrials 40 Act 15/22.5 Daily Capped Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Russell 1000 Industrials 40 Act 15/22.5 Daily Capped Index | |||
| Average Annual Return, Percent | 11.52% | 38.75% | 12.30% | 11.63% |
| Russell 1000 Technology RIC 22.5/45 Capped Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Russell 1000 Technology RIC 22.5/45 Capped Index | |||
| Average Annual Return, Percent | 18.03% | 46.28% | 24.31% | 20.89% |
| S&P Transportation Select Industry FMC Capped Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | S&P Transportation Select Industry FMC Capped Index | |||
| Average Annual Return, Percent | 8.57% | 29.23% | 10.30% | 7.73% |
| Russell 1000 Utilities RIC 22.5/45 Capped Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Russell 1000 Utilities RIC 22.5/45 Capped Index | |||
| Average Annual Return, Percent | 19.71% | 39.49% | 7.84% | 9.46% |
| Shareholder Report, Holdings (Details) | Oct. 31, 2024 |
| C000012060 | Apple, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.50% |
| C000012060 | NVIDIA Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.20% |
| C000012060 | Microsoft Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.70% |
| C000012060 | Amazon.com, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.30% |
| C000012060 | Meta Platforms, Inc.Class A | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.30% |
| C000012060 | Alphabet, Inc.Class A | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.90% |
| C000012060 | Alphabet, Inc.Class CNVS | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.60% |
| C000012060 | Berkshire Hathaway, Inc.Class B | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.60% |
| C000012060 | Broadcom, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.50% |
| C000012060 | Tesla, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.30% |
| C000012060 | Information Technology | |
| Holdings [Line Items] | |
| Percent of Total Investments | 30.50% |
| C000012060 | Financials | |
| Holdings [Line Items] | |
| Percent of Total Investments | 13.80% |
| C000012060 | Health Care | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11% |
| C000012060 | Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.20% |
| C000012060 | Industrials | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.40% |
| C000012060 | Communication Services | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.70% |
| C000012060 | Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.50% |
| C000012060 | Energy | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.40% |
| C000012060 | Real Estate | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.50% |
| C000012060 | Materials | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.50% |
| C000012060 | Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.50% |
| C000038163 | NVIDIA Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.40% |
| C000038163 | Microsoft Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.90% |
| C000038163 | Alphabet, Inc.Class A | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.80% |
| C000038163 | Alphabet, Inc.Class CNVS | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.30% |
| C000038163 | Tesla, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.70% |
| C000038163 | Visa, Inc.Class A | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.70% |
| C000038163 | Mastercard, Inc.Class A | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.60% |
| C000038163 | Home Depot, Inc. (The) | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.50% |
| C000038163 | Procter & Gamble Co. (The) | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.50% |
| C000038163 | AbbVie, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.40% |
| C000038163 | Information Technology | |
| Holdings [Line Items] | |
| Percent of Total Investments | 37.70% |
| C000038163 | Financials | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.30% |
| C000038163 | Health Care | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.10% |
| C000038163 | Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9% |
| C000038163 | Industrials | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9% |
| C000038163 | Communication Services | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.80% |
| C000038163 | Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.90% |
| C000038163 | Energy | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.40% |
| C000038163 | Real Estate | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000038163 | Materials | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.80% |
| C000038163 | Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1% |
| C000012199 | Apple, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.90% |
| C000012199 | NVIDIA Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.10% |
| C000012199 | Microsoft Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.70% |
| C000012199 | Alphabet, Inc.Class A | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| C000012199 | Alphabet, Inc.Class CNVS | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.90% |
| C000012199 | Broadcom, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.70% |
| C000012199 | Home Depot, Inc. (The) | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.70% |
| C000012199 | Coca-Cola Co. (The) | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.80% |
| C000012199 | Eli Lilly & Co. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.50% |
| C000012199 | Kellanova | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.40% |
| C000012199 | Information Technology | |
| Holdings [Line Items] | |
| Percent of Total Investments | 34% |
| C000012199 | Financials | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.20% |
| C000012199 | Health Care | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.50% |
| C000012199 | Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.10% |
| C000012199 | Industrials | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.90% |
| C000012199 | Communication Services | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.20% |
| C000012199 | Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.40% |
| C000012199 | Energy | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.90% |
| C000012199 | Real Estate | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.60% |
| C000012199 | Materials | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.40% |
| C000012199 | Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.80% |
| C000012048 | Linde PLC | |
| Holdings [Line Items] | |
| Percent of Total Investments | 21.30% |
| C000012048 | Air Products and Chemicals, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.20% |
| C000012048 | Freeport-McMoRan, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.60% |
| C000012048 | Ecolab, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.30% |
| C000012048 | Fastenal Co. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.10% |
| C000012048 | Newmont Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.90% |
| C000012048 | Nucor Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.40% |
| C000012048 | Steel Dynamics, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.20% |
| C000012048 | International Paper Co. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.10% |
| C000012048 | International Flavors & Fragrances, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000012048 | Chemicals | |
| Holdings [Line Items] | |
| Percent of Total Investments | 59% |
| C000012048 | Metals & Mining | |
| Holdings [Line Items] | |
| Percent of Total Investments | 28.20% |
| C000012048 | Containers & Packaging | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.70% |
| C000012048 | Trading Companies & Distributors | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.10% |
| C000012048 | Machinery | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.20% |
| C000012048 | Aerospace & Defense | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.80% |
| C000012050 | Amazon.com, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 14.50% |
| C000012050 | Tesla, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.90% |
| C000012050 | Home Depot, Inc. (The) | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.40% |
| C000012050 | Netflix, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.30% |
| C000012050 | Walmart, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.20% |
| C000012050 | Costco Wholesale Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.20% |
| C000012050 | McDonald's Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.60% |
| C000012050 | Walt Disney Co. (The) | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000012050 | Booking Holdings, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.70% |
| C000012050 | Lowe's Companies, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.60% |
| C000012050 | Consumer Discretionary Distribution & Retail0 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 32.50% |
| C000012050 | Consumer Services2.29 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 19.10% |
| C000012050 | Media & Entertainment0 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 13.60% |
| C000012050 | Automobiles & Components0 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.50% |
| C000012050 | Consumer Staples Distribution & Retail0.5 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.30% |
| C000012050 | Consumer Durables & Apparel1.92 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.90% |
| C000012050 | Transportation0 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.40% |
| C000012050 | Commercial & Professional Services0 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.20% |
| C000012050 | Household & Personal Products3.83 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.40% |
| C000012050 | Capital Goods0 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.10% |
| C000012194 | Procter & Gamble Co. (The) | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.90% |
| C000012194 | Coca-Cola Co. (The) | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.50% |
| C000012194 | PepsiCo, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.50% |
| C000012194 | Philip Morris International, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.70% |
| C000012194 | Altria Group, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.40% |
| C000012194 | Mondelez International, Inc.Class A | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.30% |
| C000012194 | Colgate-Palmolive Co. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.60% |
| C000012194 | CVS Health Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.30% |
| C000012194 | McKesson Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.10% |
| C000012194 | Kimberly-Clark Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.10% |
| C000012194 | Food, Beverage & Tobacco2.93 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 57.30% |
| C000012194 | Household & Personal Products2.4 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 26.40% |
| C000012194 | Health Care Equipment & Services4.71 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.10% |
| C000012194 | Consumer Staples Distribution & Retail2.13 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.20% |
| C000012194 | Materials1.07 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| C000012051 | Exxon Mobil Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 22.70% |
| C000012051 | Chevron Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 14.90% |
| C000012051 | ConocoPhillips | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.40% |
| C000012051 | EOG Resources, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.10% |
| C000012051 | Williams Companies, Inc. (The) | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.70% |
| C000012051 | Schlumberger N.V. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.30% |
| C000012051 | ONEOK, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.30% |
| C000012051 | Marathon Petroleum Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000012051 | Phillips 66 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000012051 | Kinder Morgan, Inc.Class P | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.80% |
| C000012051 | Oil, Gas & Consumable Fuels | |
| Holdings [Line Items] | |
| Percent of Total Investments | 89.90% |
| C000012051 | Energy Equipment & Services | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.30% |
| C000012051 | Semiconductors & Semiconductor Equipment | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.80% |
| C000012052 | Berkshire Hathaway, Inc.Class B | |
| Holdings [Line Items] | |
| Percent of Total Investments | 14.50% |
| C000012052 | Visa, Inc.Class A | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.50% |
| C000012052 | Mastercard, Inc.Class A | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.20% |
| C000012052 | JPMorgan Chase & Co. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.10% |
| C000012052 | Bank of America Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5% |
| C000012052 | Wells Fargo & Co. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.90% |
| C000012052 | Goldman Sachs Group, Inc. (The) | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.90% |
| C000012052 | S&P Global, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.70% |
| C000012052 | American Express Co. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.70% |
| C000012052 | Morgan Stanley | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.50% |
| C000012052 | Financial Services0 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 68.50% |
| C000012052 | Banks2.07 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 31.50% |
| C000012053 | Berkshire Hathaway, Inc.Class B | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.10% |
| C000012053 | JPMorgan Chase & Co. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.60% |
| C000012053 | Bank of America Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.50% |
| C000012053 | Wells Fargo & Co. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.10% |
| C000012053 | Goldman Sachs Group, Inc. (The) | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000012053 | S&P Global, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.70% |
| C000012053 | Morgan Stanley | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.40% |
| C000012053 | BlackRock, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.60% |
| C000012053 | Progressive Corp. (The) | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.60% |
| C000012053 | Citigroup, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.20% |
| C000012053 | Financial Services0 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 47.40% |
| C000012053 | Banks2.07 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 30.50% |
| C000012053 | Insurance0.16 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 21.70% |
| C000012053 | Commercial & Professional Services1.56 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.40% |
| C000012054 | AbbVie, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.50% |
| C000012054 | Eli Lilly & Co. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.90% |
| C000012054 | UnitedHealth Group, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.30% |
| C000012054 | Johnson & Johnson | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.90% |
| C000012054 | Merck & Co., Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.60% |
| C000012054 | Thermo Fisher Scientific, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.70% |
| C000012054 | Abbott Laboratories | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.50% |
| C000012054 | Intuitive Surgical, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.20% |
| C000012054 | Amgen, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.10% |
| C000012054 | Pfizer, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.90% |
| C000012054 | Pharmaceuticals | |
| Holdings [Line Items] | |
| Percent of Total Investments | 30.90% |
| C000012054 | Health Care Equipment & Supplies | |
| Holdings [Line Items] | |
| Percent of Total Investments | 21.10% |
| C000012054 | Biotechnology | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.90% |
| C000012054 | Health Care Providers & Services | |
| Holdings [Line Items] | |
| Percent of Total Investments | 17.60% |
| C000012054 | Life Sciences Tools & Services | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.80% |
| C000012054 | Health Care Technology | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.70% |
| C000012055 | Visa, Inc.Class A | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.90% |
| C000012055 | Mastercard, Inc.Class A | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.20% |
| C000012055 | American Express Co. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.30% |
| C000012055 | Accenture PLCClass A | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.20% |
| C000012055 | General Electric Co | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.80% |
| C000012055 | Caterpillar, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.80% |
| C000012055 | RTX Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.40% |
| C000012055 | Union Pacific Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.10% |
| C000012055 | Honeywell International, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| C000012055 | Eaton Corp. PLC | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| C000012055 | Capital Goods1.44 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 48.40% |
| C000012055 | Financial Services0.72 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 22.30% |
| C000012055 | Transportation2.26 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.60% |
| C000012055 | Materials1.81 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.50% |
| C000012055 | Commercial & Professional Services1.94 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.70% |
| C000012055 | Software & Services1.55 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4% |
| C000012055 | Technology Hardware & Equipment0 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.60% |
| C000012055 | Consumer Durables & Apparel0 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.40% |
| C000012055 | Pharmaceuticals, Biotechnology & Life Sciences0 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.40% |
| C000012055 | Semiconductors & Semiconductor Equipment0.89 | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.10% |
| C000012055 | Other RowConsumer Services | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0% |
| C000012059 | Apple, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.50% |
| C000012059 | NVIDIA Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 14.80% |
| C000012059 | Microsoft Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 14.30% |
| C000012059 | Meta Platforms, Inc.Class A | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.10% |
| C000012059 | Alphabet, Inc.Class A | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.70% |
| C000012059 | Alphabet, Inc.Class CNVS | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.20% |
| C000012059 | Broadcom, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.40% |
| C000012059 | Salesforce, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.40% |
| C000012059 | Oracle Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.30% |
| C000012059 | Advanced Micro Devices, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.10% |
| C000012059 | Other RowFinancial Services | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.20% |
| C000012059 | Semiconductors & Semiconductor Equipment | |
| Holdings [Line Items] | |
| Percent of Total Investments | 31.70% |
| C000012059 | Software | |
| Holdings [Line Items] | |
| Percent of Total Investments | 34.10% |
| C000012059 | Technology Hardware, Storage & Peripherals | |
| Holdings [Line Items] | |
| Percent of Total Investments | 17% |
| C000012059 | Interactive Media & Services | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.30% |
| C000012059 | IT Services | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.10% |
| C000012059 | Electronic Equipment, Instruments & Components | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.60% |
| C000012059 | Professional Services | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1% |
| C000012059 | Hotels, Restaurants & Leisure | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.50% |
| C000012059 | Electrical Equipment | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.40% |
| C000012059 | Communications Equipment | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.10% |
| C000012061 | Union Pacific Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 16.30% |
| C000012061 | Uber Technologies, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 17.40% |
| C000012061 | United Parcel Service, Inc.Class B | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.60% |
| C000012061 | Delta Air Lines, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.50% |
| C000012061 | Old Dominion Freight Line, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.50% |
| C000012061 | United Airlines Holdings, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.40% |
| C000012061 | CSX Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.30% |
| C000012061 | Norfolk Southern Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.20% |
| C000012061 | FedEx Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.10% |
| C000012061 | Southwest Airlines Co. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.10% |
| C000012061 | Ground Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 61.10% |
| C000012061 | Air Freight & Logistics | |
| Holdings [Line Items] | |
| Percent of Total Investments | 19.60% |
| C000012061 | Passenger Airlines | |
| Holdings [Line Items] | |
| Percent of Total Investments | 17.20% |
| C000012061 | Marine Transportation | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.10% |
| C000012062 | NextEra Energy, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.60% |
| C000012062 | Southern Co. (The) | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.10% |
| C000012062 | Duke Energy Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.30% |
| C000012062 | Waste Management, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.20% |
| C000012062 | Constellation Energy Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.90% |
| C000012062 | Sempra | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.80% |
| C000012062 | American Electric Power Co., Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.70% |
| C000012062 | Dominion Energy, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.50% |
| C000012062 | Public Service Enterprise Group, Inc. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.20% |
| C000012062 | PG&E Corp. | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.10% |
| C000012062 | Electric Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 58% |
| C000012062 | Multi-Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 22.50% |
| C000012062 | Commercial Services & Supplies | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.30% |
| C000012062 | Independent Power and Renewable Electricity Producers | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.40% |
| C000012062 | Water Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.60% |
| C000012062 | Gas Utilities | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.20% |
