Investment Strategy	Mar. 31, 2026
iShares Asia 50 ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P Asia 50TM Capped Index (the “Underlying Index”), which is a capped float-adjusted, market capitalization-weighted index that is designed to measure the performance of the 50 leading companies listed in four Asian countries or regions: Hong Kong, Singapore, South Korea and Taiwan, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index uses a capping methodology at each quarterly rebalance to limit: (i) the weight of any single issuer to a maximum of 22.5%, and (ii) the aggregate weight of all issuers that individually exceed 4.5% of the Underlying Index weight to maximum of 45%. In implementing this capping methodology, SPDJI may consider two or more companies as belonging to the same issuer where there is reasonable evidence of common control. The Underlying Index includes large-capitalization blue-chip companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the technology and financials industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Blockchain and Tech ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the NYSE FactSet Global Blockchain Technologies Index (the “Underlying Index”), which is a rules-based, modified float-adjusted market capitalization-weighted equity index that measures the performance of equity securities issued by U.S. and non-U.S. companies that are involved in the development, innovation, and utilization of blockchain and crypto technologies. The Fund may invest in non-U.S. companies, including those located in emerging markets, without any limits consistent with the Underlying Index. ICE Data Indices, LLC, or its affiliates (the “Index Provider” or “IDI”), uses FactSet’s Revere Business Industry Classification System (“RBICS”) classifications to determine the eligible universe. The Index Provider defines “blockchain” as technologies characterized by a shared, peer-to-peer, decentralized, and immutable ledger ideally suited for recording information. Information on the blockchain is secured through a validation process involving cryptography known as “mining,” which integrates a new set of information (known as a “block”) with all previous blocks on the ledger (thus creating a chain). One use of blockchain is “cryptocurrency,” which is a digital asset that typically uses blockchain’s decentralized and secured ledger as a method of verifying transactions and ownership. The Fund's investments will include companies involved in (a) cryptocurrency mining, (b) cryptocurrency trading and exchanges, (c) crypto-mining systems and/or (d) blockchain technology. IDI begins with common equity securities (including depositary receipts) that have a market capitalization of $100 million or greater and a three-month average daily trading value (“ADTV”) of $1 million or greater and are from one of 43 eligible countries (as disclosed in the Fund’s Statement of Additional Information (“SAI”)). From this starting universe, IDI selects, as “Tier 1” securities, companies generating 50% or more revenue from the following RBICS Focus Level 6 industries: Blockchain Technology; Cryptocurrency Mining; Cryptocurrency Trading and Exchanges; Cryptomining Hosting; Cryptomining Systems; and Enterprise Blockchain Technology. In order to capture those companies that design and manufacture graphics processing unit (GPU) chips necessary for mining, IDI next selects, as “Tier 2” securities, companies in the following RBICS Focus Level 6 industries: A.I./Large Scale Processing Graphics Controller; Computer/Gaming Graphics Accelerator/Controller; Cryptomining Semiconductors; Data Center Graphics Accelerator/Controller; General Graphics Accelerator/Controller; Handheld Systems Graphics Accelerator/Controller; and Video Multimedia Semiconductors. Additionally for Tier 2, IDI selects the securities of companies that have blockchain-related ancillary businesses identified with the following Revere Hierarchy Focus industries: Blockchain Technology; Cryptocurrency Mining; Cryptocurrency Trading/Exchanges; Cryptomining Hosting; Cryptomining Systems; and Enterprise Blockchain Technology. The Fund will not invest in cryptocurrency (i) directly or (ii) indirectly through the use of derivatives on such assets. The Underlying Index will have a minimum of 35 constituents at selection and will include all Tier 1 securities and a minimum of 10 Tier 2 securities, selected in descending order of float-adjusted market capitalization. The component securities of the Underlying Index are weighted by float-adjusted market capitalization with Tier 1 securities allocated a minimum weight of 75% in aggregate, subject to capping constraints. Each Tier 1 security is capped at 12%, and each Tier 2 security is capped at 4% of the Underlying Index, each at rebalance. Securities with weights greater than 4.5% shall not in aggregate exceed 45% of the Underlying Index weight at rebalance. Additionally, for any Tier 1 security whose constituent weight is greater than 10 times its three-month ADTV, its weight is determined by its liquidity weight instead of by float-adjusted market capitalization. The Index Provider determines the liquidity weight of a security as follows: index weight assigned to a security based on the relative three-month median daily value traded of the security compared to that measure for the overall index. The Underlying Index is reviewed and reconstituted in March and September each year. Constituent weights of the Underlying Index are rebalanced quarterly. The Underlying Index may include large-, mid- and small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the blockchain, financials and technology industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is owned, maintained and administered by the Index Provider, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Copper and Metals Mining ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the STOXX Global Copper and Metals Mining Index (the “Underlying Index”), which has been developed by STOXX Ltd. (the “Index Provider” or “STOXX”). The Underlying Index is composed of U.S. and non-U.S. equity securities selected from the STOXX Global Copper Universe Index (the “Parent Index”). The Parent Index is composed of large-, mid- and small-capitalization stocks from developed and emerging markets. The Underlying Index captures the performance of equity securities of companies involved in copper and metal ore mining. To construct the Underlying Index, the Index Provider begins with common equity securities (including depositary receipts) from the Parent Index and selects stocks that have a free-float market capitalization of $100 million or greater and a 3-month Average Daily Traded Volume (“ADTV”) equal to or exceeding $1 million. The Index Provider selects index constituents from the remaining companies based on tiered eligibility from Tier 1 to Tier 3. STOXX classifies Tier 1 securities as companies categorized as Copper Ore Mining under FactSet’s Revere Business and Industry Classification System (“RBICS”) Focus Level 6 Copper Ore Mining. The Index Provider’s methodology does not require a minimum number of Tier 1 securities. If there are fewer than 50 Tier 1 constituents, the shortfall is filled with Tier 2 constituents. Following the Tier 1 selection, the Index Provider ranks and selects, as Tier 2 eligible securities, companies with at least 25% revenues but less than 50% revenues derived from the RBICS Level 6 subindustry of Copper Ore Mining from highest to lowest revenue exposure. Companies are selected from the highest to the lowest revenue exposure until there are 50 stocks in the Underlying Index. Once 50 companies are reached after Tier 1 and/or 2, or there are fewer than 50 companies selected after Tier 1 and 2, the Index Provider selects companies it classifies as Tier 3. STOXX classifies Tier 3 securities as companies that are not in Tier 1 or 2 but are in the top 50% in terms of market share from Copper Ore Mining. The Index Provider defines market share by the percentile ranking of all companies in the Parent Index with at least $1 million in revenue from the RBICS Level 6 subindustry of Copper Ore Mining. Tier 3 securities are always included within the Underlying Index to ensure that companies with high dollar revenues from copper ore mining are represented. The Index Provider applies the following weight limits: a maximum of 20% weighting to Tier 3 securities. The component securities in the Underlying Index are weighted by float-adjusted market capitalization with individual securities capped at 8% and securities with weights greater than 4.5% will not in aggregate exceed 45% of the Underlying Index weight at rebalance. As of March 31, 2026, the Underlying Index had 45 securities and all of the index constituents were represented by securities of companies in the materials industry or sector. The Underlying Index may include large-, mid-and small-capitalization companies. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries: Australia, Brazil, Canada, China, Indonesia, Japan, Mexico, Poland, Saudi Arabia, United Kingdom (the “U.K.”) and the U.S. The Underlying Index will be reviewed and reconstituted on an annual basis in September and rebalanced quarterly. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index and Parent Index are sponsored by STOXX, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Emerging Markets Infrastructure ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P Emerging Markets Plus Infrastructure IndexTM (the “Underlying Index”), which is designed to track the performance of 30 of the largest publicly listed companies in the infrastructure industry in emerging markets, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index includes three distinct infrastructure sub-sectors: energy, transportation and utilities. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries or regions: Brazil, China, Mexico, Qatar, South Korea, Thailand and the United Arab Emirates. Companies domiciled in an emerging or developed market country are eligible for inclusion as long as the majority of the company's revenues are derived from emerging market operations. Based on the methodology, constituents must have a minimum total market capitalization as of the rebalancing reference date of $250 million and a minimum float adjusted market capitalization as of the rebalancing reference date of $200 million. Constituents must also have a 3-month average daily value traded of greater than $1 million. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the energy, industrials and utilities industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry. Because all of the securities included in the Underlying Index are issued by utility, energy and transportation infrastructure companies, the Fund will be concentrated in the infrastructure industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry. Because all of the securities included in the Underlying Index are issued by utility, energy and transportation infrastructure companies, the Fund will be concentrated in the infrastructure industry.
iShares Environmental Infrastructure and Industrials ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the FTSE Green Revenues Select Infrastructure and Industrials Index (the “Underlying Index”), which has been developed by FTSE International Limited (the “Index Provider” or “FTSE”). The Underlying Index is composed of U.S. and non-U.S. equity securities selected from the FTSE Global All Cap Index (the “Parent Index”). The Parent Index is composed of large-, mid- and small-capitalization stocks from developed and emerging markets. The Underlying Index captures eligible infrastructure and industrials solutions that aim to support energy efficiency and emissions mitigation, pollution reduction, or land and resource optimization. The Underlying Index is designed to reflect the equity performance of U.S. and non-U.S. companies that derive at least 40% of their combined annual green revenues in aggregate from a combination of 29 selected FTSE Green Revenues Classification System (“GRCS”) micro-sectors (as defined by the Index Provider), which were determined based on relevance to the three key themes: (1) energy efficiency and emissions mitigation, (2) pollution reduction, or (3) land and resource optimization. The energy efficiency and emissions mitigation theme includes: (i) energy efficient infrastructure solutions such as energy or resource efficient products for buildings, semiconductor and microgrid controllers, and smart grid components; (ii) clean transportation or freight solutions including electric or magnetic trains, low emissions buses, airplanes, and ships; and (iii) emissions mitigation infrastructure solutions such as carbon capture and particle or emissions reduction devices. The pollution reduction theme includes: (i) clean water solutions such as wastewater or stormwater management, water distribution, monitoring and purification, and advanced irrigation; (ii) solutions for land pollution including sustainable waste management and land decontamination services and devices; and (iii) air pollution solutions across industrial, transport, and atmospheric settings. The land and resource optimization theme includes: (i) solutions that minimize land-use and local environmental impacts such as environmental testing and desalination equipment; and (ii) recycling solutions and solutions that optimize natural resource-use including advanced and low-weight materials, smart city design, and engineering. The Index Provider begins with the Parent Index and excludes the securities of companies that it identifies as being involved in the business of tobacco, companies involved with controversial weapons, producers and retailers of civilian firearms, and companies involved in thermal coal mining, thermal coal-based power generation or the extraction of oil sands. Certain exclusions (e.g., controversial weapons or manufacturing tobacco products) are categorical, and others are based on percentage of revenue or ownership thresholds. Additionally, the Index Provider excludes companies that it determines are involved in controversies related to the ten United Nations Global Compact (“UNGC”) principles, which are classified into four categories: human rights, labor, environment and anti-corruption. The Index Provider also excludes companies with less than $100 million free float adjusted market capitalization or less than $1 million average daily trading volume over the prior sixty trading-day period. Only companies from the Utilities, Industrials, and Basic Materials Industry Classification Benchmark (ICB) sectors are eligible for inclusion. The Index Provider includes companies that, at the time of inclusion, derive at least 40% of their combined annual green revenues in aggregate from a combination of 29 selected GRCS micro-sectors (as defined by the Index Provider), which were determined based on relevance to the three key themes. The Index Provider assesses and measures a company’s green revenues under the GRCS based on the following two categories: (1) disclosure of information when a company has sufficient disclosure to measure green revenues and (2) company-specific estimates when a company has limited green revenue disclosures but there is additional non-revenue data such as production volumes, or relevant market or peer data such as market share of a product that can form a reasonable basis for estimating green revenues. The Underlying Index includes companies identified by the Index Provider as deriving green revenue from Tier 1 activities (i.e., activities with significant and clear environmental benefits, such as solar) and Tier 2 activities (i.e., activities with more limited but net positive environmental benefits, such as water utilities) but excludes companies deriving revenue from Tier 3 activities (i.e., activities with some environmental benefits but overall net neutral or negative, such as nuclear). The Index Provider weights the securities by free float adjusted market-capitalization with a 6% cap for individual stocks. The sum of all weights of issuers above 4.5% will not exceed 45%. The Underlying Index is reviewed and reconstituted semi-annually in March and September and rebalanced quarterly in March, June, September, and December. New constituents will be eligible for inclusion if they have green revenues of 40% or more. Current constituents will be removed if their green revenues fall below 35%. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries or regions: Australia, Belgium, Brazil, Canada, Chile, China, France, Germany, India, Japan, the Netherlands, Norway, Qatar, Saudi Arabia, Spain, Sweden, Switzerland, Taiwan, the United Kingdom (the “U.K.”), and the U.S. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the industrials, materials and utilities sectors. As of March 31, 2026, the Underlying Index had 79 components. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by FTSE, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Future AI & Tech ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Morningstar Global Artificial Intelligence Select Index (the “Underlying Index”), which measures the performance of equity securities issued by companies with exposure to artificial intelligence (“AI”) technologies, including generative AI, AI data and infrastructure, AI software, and AI services (each an “AI subtheme”), as determined by the equity research team of Morningstar, Inc. (the “Index Provider” or “Morningstar”). The Underlying Index is a subset of the Morningstar Global Markets Index (the “Parent Index”), which represents approximately the top 97% of the global investable equity market capitalization. The eligible universe of securities in the Underlying Index includes the Parent Index, excluding companies in India or the People’s Republic of China and companies with an average three-month trailing daily trading volume of less than $2 million and float market capitalization of less than $300 million. The Index Provider scores companies in the eligible universe on a four-point thematic exposure scale based on exposure to at least one AI subtheme and then assigns each company to one of three tiers (i.e., Tier 1, Tier 2 or Tier 3). Morningstar considers each company’s role in the AI subtheme value chain, expected net profit increase from exposure to at least one AI subtheme and the portion of revenue expected to be derived from each AI subtheme over the next five years. Many of the companies included in the eligible universe of securities for the Underlying Index may not currently earn the majority of their income from AI-related activities. Companies with a score of 2 or higher on the generative AI subtheme are assigned to Tier 1, and the rest are classified as either Tier 2 or Tier 3. All companies with a score of at least 2 across any one of the three other AI subthemes (i.e., Al data and infrastructure, Al services, or Al software) are assigned to Tier 2. Companies with an aggregate score of at least 3 across all four AI subthemes are also assigned to Tier 2. All remaining companies with a non-zero score on at least one AI subtheme are assigned to Tier 3. The Index Provider then ranks the companies to emphasize thematic purity and exposure to the generative AI subtheme according to the following ranking criteria (in descending order): • Tier 1 companies are preferred over Tier 2 companies, and Tier 2 companies are preferred over Tier 3 companies. • Generative AI subtheme score (highest to lowest). • Aggregate score across all 4 subthemes (highest to lowest). • Current index constituents are given preference. • Current total market capitalization, with preference to smaller market capitalization over larger market capitalization. Morningstar generally includes the top 50 companies in the Underlying Index, subject to adjustments for corporate actions. The Underlying Index is weighted by float-adjusted market capitalization; however, the aggregate weight of Tier 3 securities cannot exceed 10%, and the excess weight is redistributed proportionally to Tier 1 and Tier 2 securities. Additionally, the weight of any one Tier 1, Tier 2 or Tier 3 security, respectively, cannot exceed 6%, 3% and 3%, with the excess weight distributed proportionally within each Tier. If the aggregate weight of securities with a weight of at least 4.5% exceeds 22.5%, then Morningstar caps the weight of any one security at 6% and the sum of securities at 22.5%, with excess weight redistributed proportionally within each Tier. The Index Provider will review constituent weights daily to ensure the combined weight of all constituents with individual weights above 5% does not exceed 25%. If this cap is breached, the Index Provider will cap the constituent with the smallest weight above 5% to 4.5%, along with and any other constituent with a weight between 4.5% and 5%. This process will be repeated iteratively until the sum of the weights above 5% are less than 25%, with excess weight redistributed to constituents with weights below the 4.5% limit. The Underlying Index is rebalanced quarterly on the third Friday of March, June and September (effective the following business day) and reconstituted and rebalanced annually following the third Friday of December (effective the following business day). To remain in the Underlying Index, current constituents must have an average three-month daily trading volume of at least $1.6 million and a free-float market capitalization of at least $240 million at the annual reconstitution. As of March 31, 2026, the Underlying Index consisted of 50 issuers from the following nine countries or regions: Australia, Canada, France, Israel, Japan, South Korea, Taiwan, United Arab Emirates and the U.S. The Underlying Index may include large-, mid- and small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the technology and AI industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by Morningstar which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Future Metaverse Tech and Communications ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Board of the Trust approved the closure and liquidation of the Fund. After market close on August 12, 2026, the Fund will cease the creation and redemption of Creation Units (as defined herein). Trading in the Fund will be halted prior to market open on August 13, 2026. Proceeds of the liquidation are scheduled to be sent to Fund shareholders on or around August 17, 2026 (the “Liquidation Date”). While the Fund is in the process of liquidating its portfolio, which is anticipated to commence prior to August 12, 2026, the Fund will hold cash and securities that will not be consistent with its investment objective and strategies and is likely to incur higher tracking error than is typical for the Fund. Furthermore, the Trust cannot assure that there will be a trading market for Fund shares between market close on August 12, 2026 and the Liquidation Date because Fund shares will not be traded on NYSE Arca, Inc. (“NYSE Arca”) during that period. Shareholders may sell their holdings of the Fund on NYSE Arca until market close on August 12, 2026 and may incur the usual and customary brokerage commissions associated with the sale of Fund shares. As of the Liquidation Date, shares of the Fund will be individually redeemed. If you hold Fund shares on the Liquidation Date, the Fund will automatically redeem your shares for cash based on the net asset value of the Fund as of the close of business on August 12, 2026, which will include any dividends or distributions calculated as of that date. Prior to the Liquidation Date, the Fund seeks to track the investment results of the Morningstar© Global Metaverse & Virtual Interaction Select IndexSM (the “Underlying Index”), which measures the performance of equity securities issued by U.S. and non-U.S. companies that enable the “metaverse” and virtual interactions, as determined by Morningstar or its affiliates (“Morningstar” or the “Index Provider”). The Index Provider defines “metaverse” as a three-dimensional immersive digital world. Morningstar evaluates companies based on five-year net profit and revenue projections as a producer or supplier with respect to six themes: • Metaverse Platforms: Technologies that facilitate virtual interactions across a high volume of users, combining elements of 3D rendering and simulation software, wearable technology, immersive gaming, enhanced social media, and digital assets and payments. • Wearable Technology and VR/AR: Virtual reality (“VR”) is the use of computer technology to create the effect of an interactive three-dimensional world in which the objects have a sense of spatial presence. Augmented reality (“AR”) is an enhanced version of reality created by the use of technology to overlay digital information on an image of something being viewed through a device. • Enhanced Social Media: Interactive digital channels, enhanced by the use of VR and AR platforms, that allow users to create and share content. • Immersive Gaming: All-encompassing online games that many players can play simultaneously and the associated tools and hardware that facilitate their development. • 3D Rendering and Simulation Software: Software and tools leveraged by businesses, consumers, and brands to build and develop content for VR and AR platforms. • Digital Assets and Payments: A digital asset is a collection of binary data which is self-contained, uniquely identifiable, and has a value, such as non-fungible tokens and cryptocurrencies. Digital payments are transfers of value from one payment account to another by use of a digital device, with no exchange of cash. This theme targets companies that facilitate the use of payment solutions or digital assets in the metaverse or enhanced shared virtual spaces. The Fund does not invest in cryptocurrencies or other digital assets directly or indirectly through the use of derivatives on such assets. To construct the Underlying Index, the Index Provider begins with the Morningstar Global Markets ex-India Index and excludes companies with an average three-month trailing daily trading volume of less than $2 million or a free float market capitalization of less than $300 million. Current index constituents are ineligible if they have average three-month daily trading volume of less than $1.5 million or a free-float market capitalization less than $200 million at rebalance. To be eligible for inclusion, a company must be classified by the Index Provider as either a producer of goods or services related to a theme or a supplier of such producers. In addition, the issuer must have current exposure from at least one theme and, as determined by Morningstar, must be highly likely to experience at least a 5% increase in net profit over the next five years from exposure to that theme. Morningstar research analysts estimate the percentage of total revenue that a company will derive over the next five years from its exposure to each theme of the Underlying Index. In making these projections, the research analysts may take into account, among other things, financial statements, historical growth rates, competitive and industry analyses, macroeconomic factors, and news and other data sources. Based on the analysts’ revenue projections, each company is assigned an “exposure score” for each theme as follows: • Score of 0: Less than 10% of the issuer’s total revenue • Score of 1: 10-25% of the issuer’s total revenue • Score of 2: 25-50% of the issuer’s total revenue • Score of 3: Greater than 50% of the total revenue of an issuer that is a supplier • Score of 4: Greater than 50% of the total revenue of an issuer that is a producer A Morningstar committee reviews the assigned scores to help ensure internal consistency. If a company has an exposure score of zero for each theme, it is excluded from the Underlying Index. The remaining potential constituents are designated as Tier 1 or Tier 2. Tier 1 issuers are those with an aggregate score (the sum of all exposure scores) of 3 or more and at least an aggregate, non-overlapping revenue exposure of 25% across all themes relative to company-wide revenue. Tier 2 issuers are those with an aggregate score of less than 3. Morningstar ranks Tier 2 issuers with preference given to higher aggregate score, number of themes with higher scores, current index constituents, and smaller market capitalization. All Tier 1 constituents are selected for the Underlying Index. However, if there are fewer than 50 Tier 1 constituents, the shortfall is filled with Tier 2 constituents, and the Underlying Index is capped at 50 constituents. Constituents are float-adjusted market capitalization-weighted with a minimum 80% weight, in aggregate, allocated to Tier 1 constituents. Individual Tier 1 constituents have a 6% cap, while individual Tier 2 constituents have a 3% cap. Constituents with an aggregate score of 1, or an aggregate score of 2 of which one point comes from Metaverse Platforms, are constrained to 10% of the Underlying Index. Of the 10% weight, at most only 5% can be in sectors outside of technology or communications. At each rebalance, issuers with weights over 4.5% shall not in aggregate exceed 45% of the Underlying Index. In case there is no feasible solution for capping, the Index Provider will loosen constraints until a solution can be found, such as reducing the minimum weight of Tier 1 constituents in 1% increments until that capping is feasible. The Underlying Index is reconstituted each December and rebalanced quarterly. The themes are reviewed annually by the Index Provider and are subject to change as they evolve, and new themes emerge. The Underlying Index may include large-, mid- and small-capitalization companies and may change over time. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the communications, financials and technology industries or sectors. As of March 31, 2026, the Underlying Index included 41 constituents from the following countries or regions: China, France, Japan, South Korea, the Netherlands and the U.S. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by Morningstar, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares India 50 ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Nifty 50 IndexTM (the “Underlying Index”), which measures the equity performance of the top 50 companies by free float market capitalization whose equity securities trade in the Indian securities markets, as determined by NSE Indices Ltd. (formerly known as India Index Services & Products Limited) (the “Index Provider” or “NSEI”). As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and financials industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Underlying Index is a product of NSEI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. This Prospectus and the SAI have not been filed with the Securities and Exchange Board of India (“SEBI”), and SEBI will not in any manner vouch for the financial soundness of the Fund, BFA or the Portfolio Managers (as defined below), or for the adequacy of the statements made in this Prospectus and the SAI. BFA and the Portfolio Managers will not be registered with SEBI. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares International Dividend Growth ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Morningstar® Global ex-US Dividend Growth IndexSM (the “Underlying Index”), which is a dividend dollars weighted index that seeks to measure the performance of international equities selected based on a consistent history of growing dividends, as determined by Morningstar Inc. (the “Index Provider” or “Morningstar”). The Underlying Index is a subset of the Morningstar® Global Markets ex-US IndexSM, which is a diversified broad market index that represents approximately 97% of the market capitalization in international developed and emerging markets, as defined by Morningstar. Eligible companies for the Underlying Index must pay a dividend and not be classified as a REIT, must have at least five years of uninterrupted annual dividend growth and must have an earnings payout ratio of less than 75%. A company that is in the top decile of dividend yield for its region, as defined by the Index Provider (for example, Developed Asia Pacific, Developed Europe, Middle East and Africa, Developed North America ex-US (Canada) and Emerging Markets), is excluded from the Underlying Index. The Underlying Index is weighted by dividend dollars (total value of dividends paid out over the past trailing 12 months) and constrained by capping each company at 3%. The Underlying Index was composed of securities of companies in 34 countries as of March 31, 2026. The Underlying Index may include large-, mid- and small- capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and financials industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by Morningstar, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Latin America 40 ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P Latin America 40TM (the “Underlying Index”), which is composed of selected equities trading on the exchanges of five Latin American countries. The Underlying Index includes securities that S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”), a subsidiary of S&P Global, Inc., considers to be highly liquid from major economic sectors of the Mexican and South American equity markets. Companies from Brazil, Chilé, Colombia, Mexico and Peru are represented in the Underlying Index. The Underlying Index includes large capitalization blue-chip companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the financials and materials industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Lithium Miners and Producers ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the STOXX Global Lithium Miners and Producers Index (the “Underlying Index”), which has been developed by STOXX Ltd. (the “Index Provider” or “STOXX”). The Underlying Index is composed of U.S. and non-U.S. equity securities selected from the STOXX Global Lithium Universe Index (the “Parent Index”). The Parent Index is composed of large-, mid- and small-capitalization stocks from developed and emerging markets. The Underlying Index captures the performance of equity securities of companies involved in lithium ore mining and/or lithium compounds manufacturing. To construct the Underlying Index, the Index Provider begins with common equity securities from the Parent Index and selects stocks that have a free-float market capitalization of $100 million or greater, 3-month Average Daily Traded Volume (“ADTV”) equal to or exceeding $1 million and have FactSet’s Revere Business and Industry Classification System (“RBICS”) Focus Level 1 classification of Non-Energy Materials. The following RBICS sectors are defined for the selection process: Africa Lithium Ore Mining, Australia including Oceania Lithium Ore Mining, Diversified Lithium Ore Mining, Europe Lithium Ore Mining, Latin America Lithium Ore Mining, North America Lithium Ore Mining, Pan-Americas Lithium Ore Mining, Pan-Asia/Pacific Lithium Ore Mining and Rest of Asia/Pacific Lithium Ore Mining (the “Lithium Ore Mining RBICS Focus Level 6” or “Lithium Ore Mining RBICS” sectors). From the remaining securities, the Index Provider selects Tier 1 securities according to the following steps: (i) companies categorized as one of the Lithium Ore Mining RBICS sectors (ii) companies categorized as Lithium Compounds Manufacturing under RBICS Focus Level 6 (or “Lithium Compounds Manufacturing” sub-category) and (iii) companies that derive at least 50% combined revenues from the Lithium Ore Mining RBICS sectors and Lithium Compounds Manufacturing sub-category. Following the Tier 1 selection, the Index Provider ranks and selects, as Tier 2 eligible securities, companies with at least 25% but less than 50% combined revenues derived from the Lithium Ore Mining RBICs sectors and Lithium Compounds Manufacturing sub-category from highest to lowest revenue exposure. All Tier 1 constituents are selected for the Underlying Index. However, if there are fewer than 50 Tier 1 constituents, the shortfall is filled with Tier 2 constituents, and the Underlying Index is capped at 50 constituents. The Index Provider’s methodology does not require a minimum number of Tier 1 securities. The Index Provider applies tier group weight limits. For Tier 1, the Index Provider applies at least a 25% weighting to the categories within steps (i) and (ii) above, as well as a maximum weight of 25% to Tier 2 securities. In addition, the Index Provider applies at least a 90% weighting to High Exposure Companies, which it defines as a combination of (i) Tier 1 constituents and (ii) companies that are in the top twenty percent in terms of market share. Market share is defined by STOXX as the percentile ranking of all companies in the Parent Index with combined revenue from the Lithium Ore Mining RBICS sectors and Lithium Compounds Manufacturing sub-category greater than or equal to 1 million USD. The component securities in the Underlying Index are weighted by float-adjusted market capitalization with individual securities capped at 8% and securities with weights greater than 4.5% will not in aggregate exceed 45% of the Underlying Index weight at rebalance. As of March 31, 2026, the Underlying Index had 34 securities and a significant portion of the index was represented by securities of companies in the materials industry or sector. The Underlying Index may include large-, mid- and small-capitalization companies. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries: Australia, Chile, China, South Korea, and the U.S. The Underlying Index will be reviewed and reconstituted on an annual basis in September and rebalanced quarterly. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index and Parent Index are sponsored by STOXX, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Global 100 ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P Global 100TM (the “Underlying Index”), which is designed to measure the performance of the stocks of approximately 100 large-capitalization global companies. The stocks in the Underlying Index are expected to be highly liquid and represent some of the largest multinational businesses in the world. The Underlying Index is a subset of the S&P Global 1200TM and contains 102 common stocks as of March 31, 2026, screened for sector representation, liquidity and size. The market capitalization of constituent companies is adjusted to reflect the available float and, if necessary, any foreign investment restrictions. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries: Australia, China, France, Germany, Japan, the Netherlands, South Korea, Spain, Switzerland, the United Kingdom (the “U.K.”) and the U.S. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and technology industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”), which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry. Diversification Policy. The Fund intends to be diversified in approximately the same proportion as the Underlying Index is diversified and to invest all or substantially all of its assets in components of the Underlying Index in approximately the same proportion as each component’s weighting in the Underlying Index. This diversification policy may limit the Fund’s ability to use representative sampling. The Fund may become “non-diversified,” as defined in the 1940 Act, solely as a result of a change in relative market capitalization or index weighting of one or more components of the Underlying Index. Shareholder approval will not be sought if the Fund becomes “non-diversified” due solely to a change in the relative market capitalization or index weighting of one or more components of the Underlying Index. The Fund discloses its portfolio holdings and weightings at www.iShares.com.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Global Comm Services ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P Global 1200 Communication Services 4.5/22.5/45 Capped IndexTM (the “Underlying Index”), which is designed to measure the performance of global equities in the communication services sector. The Underlying Index is a subset of the S&P Global 1200TM, which is designed to measure the performance of large-capitalization stocks from major global markets, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index uses a capping methodology to limit the weight of the securities of any single issuer (as determined by SPDJI) to a maximum of 25% of the Underlying Index. The capping methodology limits the sum of the weights of the securities of all issuers that individually constitute more than 5%of the weight of the Underlying Index to a maximum of 50% of the weight of the Underlying Index in the aggregate. In order to implement this capping methodology, the Underlying Index constrains at quarterly rebalance: (i) the weight of any single issuer to a maximum of 22.5%, and (ii) the aggregate weight of all issuers that individually exceed 4.5% of the index weight to maximum of 45%. In implementing this capping methodology, SPDJI may consider two or more companies as belonging to the same issuer where there is reasonable evidence of common control. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the communication services industry or sector. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries: Australia, Brazil, Canada, China, Finland, France, Germany, Italy, Japan, Mexico, the Netherlands, Norway, Singapore, South Korea, Spain, Sweden, Switzerland, the United Kingdom (the “U.K.”) and the U.S. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Global Consumer Discretionary ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P Global 1200 Consumer Discretionary (Sector) Capped IndexTM (the “Underlying Index”), which is designed to measure the performance of global equities in the consumer discretionary sector. The Underlying Index uses a capping methodology. The capping methodology limits the sum of the weights of the securities of all issuers that individually constitute more than 5% of the weight of the Underlying Index to a maximum of 25% of the weight of the Underlying Index in the aggregate. In order to implement this capping methodology, the Underlying Index rebalances quarterly to limit the aggregate weight of all issuers that individually exceed 4.50% of the Underlying Index weight to a maximum of 22.50%. Between scheduled quarterly reviews, the Underlying Index is rebalanced at the end of any day on which issuers that individually constitute more than 5% of the weight of the Underlying Index collectively represent more than 25% of the weight of the Underlying Index in the aggregate. In implementing this capping methodology, S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”)) may consider two or more companies as belonging to the same issuer where there is reasonable evidence of common control. The Underlying Index is a subset of the S&P Global 1200TM, which is designed to measure the performance of large-capitalization stocks from major global markets, as determined by SPDJI. Component companies include consumer product manufacturing, service and retail companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services industry or sector. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries or regions: Australia, Canada, Chilé, China, Denmark, France, Germany, Italy, Japan, the Netherlands, South Korea, Spain, Sweden, Switzerland, the United Kingdom (the “U.K.”) and the U.S. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Global Consumer Staples ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P Global 1200 Consumer Staples (Sector) Capped Index (the “Underlying Index”), which is designed to measure the performance of global equities in the consumer staples sector (as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”)). The Underlying Index uses a capping methodology. The capping methodology limits the sum of the weights of the securities of all issuers that individually constitute more than 5% of the weight of the Underlying Index to a maximum of 25% of the weight of the Underlying Index in the aggregate. In order to implement this capping methodology, the Underlying Index rebalances quarterly to limit the aggregate weight of all issuers that individually exceed 4.50% of the Underlying Index weight to maximum of 22.50%. Between scheduled quarterly index reviews, the Underlying Index is rebalanced at the end of any day on which all issuers that individually constitute more than 5% of the weight of the Underlying Index collectively represent more than 25% of the weight of the Underlying Index in the aggregate. In implementing this capping methodology, SPDJI may consider two or more companies as belonging to the same issuer where there is reasonable evidence of common control. The Underlying Index is a subset of the S&P Global 1200TM, which is designed to measure the performance of large-capitalization stocks from major global markets, as determined by SPDJI. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services industry or sector. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries: Australia, Belgium, Brazil, Canada, Chile, Denmark, Finland, France, Germany, Ireland, Japan, Mexico, the Netherlands, Norway, Portugal, Sweden, Switzerland, the United Kingdom (the “U.K.”) and the U.S. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Global Energy ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P Global 1200 Energy 4.5/22.5/45 Capped IndexTM (the “Underlying Index”), which is designed to measure the performance of global equities in the energy sector. The Underlying Index is a subset of the S&P Global 1200, which is designed to measure the performance of large-capitalization stocks from major global markets, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index uses a capping methodology to limit the weight of the securities of any single issuer (as determined by SPDJI) to a maximum of 25% of the Underlying Index. The capping methodology limits the sum of the weights of the securities of all issuers that individually constitute more than 5%of the weight of the Underlying Index to a maximum of 50% of the weight of the Underlying Index in the aggregate. In order to implement this capping methodology, the Underlying Index constrains at quarterly rebalance: (i) the weight of any single issuer to a maximum of 22.5%, and (ii) the aggregate weight of all issuers that individually exceed 4.5% of the index weight to a maximum of 45%. In implementing this capping methodology, SPDJI may consider two or more companies as belonging to the same issuer where there is reasonable evidence of common control. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the energy industry or sector. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries: Australia, Austria, Brazil, Canada, China, Colombia, Finland, France, Ireland, Italy, Japan, Norway, Portugal, Spain, the United Kingdom (the “U.K.”) and the U.S. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Global Financials ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P Global 1200 Financials (Sector) Capped IndexTM (the “Underlying Index”), which measures the performance of companies that S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”), a subsidiary of S&P Global, Inc., deems to be part of the financials sector of the economy and that SPDJI believes are important to global markets. The Underlying Index is a subset of the S&P Global 1200, which is designed to measure the performance of large-capitalization stocks from major global markets, as determined by SPDJI. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the financials industry or sector. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries or regions: Australia, Austria, Belgium, Brazil, Canada, Chilé, China, Colombia, Denmark, Finland, France, Germany, Hong Kong, Ireland, Italy, Japan, Mexico, the Netherlands, Norway, Peru, Singapore, South Korea, Spain, Sweden, Switzerland, Taiwan, the United Kingdom (the “U.K.”) and the U.S. The Underlying Index uses a capping methodology. The capping methodology limits the sum of the weights of the securities of all issuers that individually constitute more than 5% of the weight of the Underlying Index to a maximum of 25% of the weight of the Underlying Index in the aggregate. In order to implement this capping methodology, the Underlying Index rebalances quarterly to limit the aggregate weight of all issuers that individually exceed 4.50% of the Underlying Index weight to a maximum of 22.50%. Between scheduled quarterly reviews, the Underlying Index is rebalanced at the end of any day on which issuers that individually constitute more than 5% of the weight of the Underlying Index collectively represent more than 25% of the weight of the Underlying Index in the aggregate. In implementing this capping methodology SPDJI may consider two or more companies as belonging to the same issuer where there is reasonable evidence of common control. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Global Healthcare ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P Global 1200 Health Care (Sector) Capped IndexTM (the “Underlying Index”), which measures the performance of companies that S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”), a subsidiary of S&P Global, Inc., deems to be a part of the healthcare sector of the economy and that SPDJI believes are important to global markets. The Underlying Index is a subset of the S&P Global 1200, which is designed to measure the performance of large-capitalization stocks from major global markets, as determined by SPDJI. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the healthcare industry or sector. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries: Australia, Belgium, Brazil, China, Denmark, France, Germany, Japan, the Netherlands, South Korea, Spain, Sweden, Switzerland, the United Kingdom (the “U.K.”) and the U.S. The Underlying Index uses a capping methodology. The capping methodology limits the sum of the weights of the securities of all issuers that individually constitute more than 5% of the weight of the Underlying Index to a maximum of 25% of the weight of the Underlying Index in the aggregate. In order to implement this capping methodology, the Underlying Index rebalances quarterly to limit the aggregate weight of all issuers that individually exceed 4.50% of the Underlying Index weight to a maximum of 22.50%. Between scheduled quarterly reviews, the Underlying Index is rebalanced at the end of any day on which issuers that individually constitute more than 5% of the weight of the Underlying Index collectively represent more than 25% of the weight of the Underlying Index in the aggregate. In implementing this capping methodology SPDJI may consider two or more companies as belonging to the same issuer where there is reasonable evidence of common control. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Global Industrials ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P Global 1200 Industrials (Sector) Capped IndexTM (the “Underlying Index”), which measures the performance of companies that S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”), a subsidiary of S&P Global, Inc., deems to be part of the industrials sector of the economy and that SPDJI believes are important to global markets. The Underlying Index is a subset of the S&P Global 1200, which is designed to measure the performance of large-capitalization stocks from major global markets, as determined by SPDJI. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the industrials industry or sector. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries or regions: Australia, Brazil, Canada, Chilé, Denmark, Finland, France, Germany, Hong Kong, Ireland, Italy, Japan, Mexico, the Netherlands, Norway, South Korea, Spain, Sweden, Switzerland, the United Kingdom (the “U.K.”) and the U.S. The Underlying Index uses a capping methodology. The capping methodology limits the sum of the weights of the securities of all issuers that individually constitute more than 5% of the weight of the Underlying Index to a maximum of 25% of the weight of the Underlying Index in the aggregate. In order to implement this capping methodology, the Underlying Index rebalances quarterly to limit the aggregate weight of all issuers that individually exceed 4.50% of the Underlying Index weight to a maximum of 22.50%. Between scheduled quarterly reviews, the Underlying Index is rebalanced at the end of any day on which issuers that individually constitute more than 5% of the weight of the Underlying Index collectively represent more than 25% of the weight of the Underlying Index in the aggregate. In implementing this capping methodology SPDJI may consider two or more companies as belonging to the same issuer where there is reasonable evidence of common control. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Global Infrastructure ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P Global Infrastructure IndexTM (the “Underlying Index”), which is designed to track performance of the stocks of large infrastructure companies in developed or emerging markets (only developed market listings are eligible for stocks of issuers domiciled in emerging markets). The Underlying Index includes companies involved in utilities, energy and transportation infrastructure, such as the management or ownership of oil and gas storage and transportation; airport services; highways and rail tracks; marine ports and services; and electric, gas and water utilities. As of March 31, 2026, the Underlying Index was comprised of securities of companies in the following countries: Australia, Brazil, Canada, China, France, Germany, Italy, Japan, Luxembourg, Mexico, New Zealand, Singapore, Spain, Switzerland, the United Kingdom (the “U.K.”) and the U.S. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the energy, industrials, infrastructure and utilities industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”), which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Global Materials ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P Global 1200 Materials (Sector) Capped IndexTM (the “Underlying Index”), which measures the performance of companies that S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”), a subsidiary of S&P Global, Inc., deems to be part of the materials sector of the economy and that SPDJI believes are important to global markets. The Underlying Index is a subset of the S&P Global 1200, which is designed to measure the performance of large-capitalization stocks from major global markets, as determined by SPDJI. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the materials industry or sector. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries: Australia, Belgium, Brazil, Canada, Chilé, Denmark, Finland, France, Germany, Japan, Luxembourg, Mexico, the Netherlands, Norway, Peru, Sweden, Switzerland, the United Kingdom (the “U.K.”) and the U.S. The Underlying Index uses a capping methodology. The capping methodology limits the sum of the weights of the securities of all issuers that individually constitute more than 5% of the weight of the Underlying Index to a maximum of 25% of the weight of the Underlying Index in the aggregate. In order to implement this capping methodology, the Underlying Index rebalances quarterly to limit the aggregate weight of all issuers that individually exceed 4.50% of the Underlying Index weight to a maximum of 22.50%. Between scheduled quarterly reviews, the Underlying Index is rebalanced at the end of any day on which issuers that individually constitute more than 5% of the weight of the Underlying Index collectively represent more than 25% of the weight of the Underlying Index in the aggregate. In implementing this capping methodology SPDJI may consider two or more companies as belonging to the same issuer where there is reasonable evidence of common control. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Global Tech ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P Global 1200 Information Technology 4.5/22.5/45 Capped IndexTM (the “Underlying Index”), which is designed to measure the performance of global equities in the information technology sector. The Underlying Index is a subset of the S&P Global 1200, which is designed to measure the performance of large-capitalization stocks from major global markets, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index uses a capping methodology to limit the weight of the securities of any single issuer (as determined by SPDJI) to a maximum of 25% of the Underlying Index. The capping methodology limits the sum of the weights of the securities of all issuers that individually constitute more than 5%of the weight of the Underlying Index to a maximum of 50% of the weight of the Underlying Index in the aggregate. In order to implement this capping methodology, the Underlying Index constrains at quarterly rebalance: (i) the weight of any single issuer to a maximum of 22.5%, and (ii) the aggregate weight of all issuers that individually exceed 4.5% of the index weight to a maximum of 45%. In implementing this capping methodology, SPDJI may consider two or more companies as belonging to the same issuer where there is reasonable evidence of common control. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the technology industry or sector. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries: Australia, Canada, China, Finland, France, Germany, Italy, Japan, the Netherlands, New Zealand, South Korea, Sweden, Switzerland, Taiwan, the United Kingdom (the “U.K.”) and the U.S. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Global Timber & Forestry ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P Global Timber & Forestry IndexTM (the “Underlying Index”), which measures the performance of companies engaged in the ownership, management or upstream supply chain of forests and timberlands from both developed and emerging markets. These include forest products companies, timber real estate investment trusts (“REITs”), paper products companies, paper packaging companies and agricultural products companies. Because many securities included in the Underlying Index may be issued by specialized REITs and forest products companies, the Fund is concentrated in the specialized REITs and forest products industries. Companies are eligible for inclusion if they have a minimum total market capitalization of greater than or equal to $300 million, a float adjusted market capitalization (“FMC”) of greater than or equal to $100 million, a median daily value traded of at least $3 million ($2 million for existing constituents) for the six months prior to the rebalancing reference date. Stocks that meet the above eligibility criteria are reviewed for specific practices related to timber and forestry. Underlying Index constituents are drawn from the S&P Global BMI. The preliminary universe of companies is identified based on any of the following screens: • Companies that derive at least 25% in aggregate revenue from Timber and Forestry-related businesses as defined by FactSet’s Revere Business Industry Classification System (“RBICS”) data. • Companies defined as Timber REITs that have a GICS Specialized REITs classification. • Companies in the universe at the previous rebalancing that were assigned an Exposure Score of at least 0.5 (including companies that were not actually selected for inclusion). Companies with greater than 75% aggregate revenue from Timber and Forestry-related businesses and all companies from the GICS Timber REITs sub-industry are included in the Underlying Index. If the total number of companies is less than 100, the Index Provider next adds additional constituents in order of revenue exposure to Timber and Forestry-related businesses (the “Exposure Score”) and FMC until the constituent count reaches 100 or until all constituents with an Exposure Score of 0.5 or above are selected. The Underlying Index is weighted based on the product of each constituent's Exposure Score and FMC, subject to certain constraints. In addition, the Index Provider uses company exclusion criteria related to business activity (e.g., controversial weapons, tobacco, thermal coal, etc.) and other exclusion guidelines based on a company’s compliance with the United Nations Global Compact (“UNGC”) provided by Sustainalytics. Effective with the index review in September 2024, the Index Provider will utilize measurements from S&P Global Business Involvement Screens when monitoring the company exclusion criteria related to business activity (e.g., controversial weapons, tobacco, thermal coal, etc.). Lastly, the Index Provider uses its proprietary controversies model for screening and analysis of controversies related to companies within the Underlying Index. Companies without coverage are ineligible for index inclusion until they receive such coverage. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries: Brazil, Canada, Chilé, China, Finland, Japan, South Africa, Sweden, Thailand, the United Kingdom (the “U.K.”) and the U.S. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the materials, natural resources and timber and forestry-related industries, sub-industries, sectors or sub-sectors. The components of the Underlying Index are likely to change over time. The Underlying Index is reconstituted semi-annually after the close of the last business day in March and September. The reference date for the reconstitutions is after the close of the last business day of February and August, respectively. In addition, the Underlying Index is reweighted quarterly after the close on the last business day of March, June, September, and December. The pricing reference date used for re-weighting purposes is seven business days prior to the effective date. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”), which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Global Utilities ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P Global 1200 Utilities (Sector) Capped IndexTM (the “Underlying Index”), which measures the performance of companies that S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”), a subsidiary of S&P Global, Inc., deems to be part of the utilities sector of the economy. The Underlying Index is a subset of the S&P Global 1200, which is designed to measure the performance of large-capitalization stocks from major global markets, as determined by SPDJI. The Underlying Index uses a capping methodology. The capping methodology limits the sum of the weights of the securities of all issuers that individually constitute more than 5% of the weight of the Underlying Index to a maximum of 25% of the weight of the Underlying Index in the aggregate. In order to implement this capping methodology, the Underlying Index constrains at quarterly rebalance the aggregate weight of all issuers that individually exceed 4.5% of the index weight to a maximum of 22.5%. Between scheduled quarterly index reviews, the Underlying Index is rebalanced at the end of any day on which all issuers that individually constitute more than 5% of the weight of the Underlying Index collectively represent more than 25% of the weight of the Underlying Index in the aggregate. In implementing this capping methodology, SPDJI considers two or more companies as belonging to the same issuer where more than 20% of all voting shares in a subsidiary are controlled by the same issuer control group. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the utilities industry or sector. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries or regions: Australia, Austria, Brazil, Canada, Chile, Colombia, Denmark, Finland, France, Germany, Italy, Japan, Portugal, Spain, the United Kingdom (the “U.K.”) and the U.S. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares U.S. Aerospace & Defense ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Dow Jones U.S. Select Aerospace & Defense Index (the “Underlying Index”), which measures the performance of the aerospace and defense sector of the U.S. equity market, as defined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). Aerospace companies in the Underlying Index include manufacturers, assemblers and distributors of aircraft and aircraft parts. Defense companies in the Underlying Index include producers of components and equipment for the defense industry, such as military aircraft, radar equipment and weapons. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the aerospace and defense and industrials industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares U.S. Broker-Dealers & Securities Exchanges ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Dow Jones U.S. Select Investment Services Index (the “Underlying Index”), which measures the performance of the investment services sector of the U.S. equity market, as defined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index includes companies providing a range of specialized financial services, including securities brokers and dealers, online brokers, and securities or commodities exchanges. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the financials industry or sector. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares U.S. Healthcare Providers ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Dow Jones U.S. Select Health Care Providers Index (the “Underlying Index”), which measures the performance of the healthcare providers sector of the U.S. equity market, as defined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index includes companies that are healthcare providers, such as owners and operators of health maintenance organizations, hospitals, clinics, dental and eye care facilities, nursing homes and rehabilitation and retirement centers. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the healthcare industry or sector. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares U.S. Home Construction ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Dow Jones U.S. Select Home Construction Index (the “Underlying Index”), which measures the performance of the home construction sector of the U.S. equity market, as defined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index includes companies that are constructors of residential homes, including manufacturers of mobile and prefabricated homes; manufacturers and distributors of furniture; retailers and wholesalers concentrating on the sale of home improvement products; and producers of materials used in the construction and refurbishment of buildings and structures. Companies classified as Building Materials & Fixtures, Furnishings, and Home Improvement Retailers must derive a majority of their revenues from residential home construction and remodel-related business activities to be included in the Underlying Index and are, in aggregate, capped at 35% of the Underlying Index. The companies selected for inclusion in the Underlying Index must meet minimum market capitalization requirements, as determined by the Index Provider. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services, home construction and industrials industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares U.S. Insurance ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Dow Jones U.S. Select Insurance Index (the “Underlying Index”), which measures the performance of the insurance sector of the U.S. equity market, as defined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the insurance industry or sector. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares U.S. Medical Devices ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Dow Jones U.S. Select Medical Equipment Index (the “Underlying Index”), which measures the performance of the medical equipment sector of the U.S. equity market, as defined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index includes medical equipment companies, including manufacturers and distributors of medical devices such as magnetic resonance imaging (MRI) scanners, prosthetics, pacemakers, X-ray machines, and other nondisposable medical devices. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the healthcare and medical equipment industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares U.S. Oil & Gas Exploration & Production ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Dow Jones U.S. Select Oil Exploration & Production Index (the “Underlying Index”), which measures the performance of the oil exploration and production sector of the U.S. equity market, as defined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index includes companies that are engaged in the exploration for and drilling, production, refining, and supply of oil and gas products. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the energy industry or sector. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares U.S. Oil Equipment & Services ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Dow Jones U.S. Select Oil Equipment & Services Index (the “Underlying Index”), which measures the performance of the oil equipment and services sector of the U.S. equity market, as defined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index includes companies that are suppliers of equipment or services to oil fields and offshore platforms, such as drilling, exploration, seismic information services and platform construction. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the energy industry or sector. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares U.S. Pharmaceuticals ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Dow Jones U.S. Select Pharmaceuticals Index (the “Underlying Index”), which measures the performance of the pharmaceuticals sector of the U.S. equity market, as defined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index includes pharmaceutical companies such as manufacturers of prescription or over-the-counter drugs or vaccines. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the healthcare and pharmaceuticals industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares U.S. Real Estate ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Dow Jones U.S. Real Estate Capped Index (the “Underlying Index”), which measures the performance of the real estate sector of the U.S. equity market, as defined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index constrains at each quarterly review: (i) the weight of any single issuer (as determined by SPDJI) to a maximum of 10%, and (ii) the aggregate weight of all issuers that individually exceed 4.50% of the index weight to a maximum of 22.50%. Between scheduled quarterly index reviews, the Underlying Index is rebalanced at the end of any day on which all issuers that individually constitute more than 5% of the weight of the Underlying Index constitute more than 25% of the weight of the Underlying Index in the aggregate. In implementing this capping methodology, SPDJI may consider two or more companies as belonging to the same issuer where there is reasonable evidence of common control. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the real estate investment trust (“REIT”) industry or sector. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares U.S. Regional Banks ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Dow Jones U.S. Select Regional Banks Index (the “Underlying Index”), which measures the performance of the regional bank sector of the U.S. equity market, as defined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index is a subset of the Dow Jones U.S. Bank Index (the “Parent Index”). Regional banks are selected for inclusion in the Underlying Index based on their relative three-year average total assets as a percentage of the three-year average total assets held by all banks in the Parent Index, as determined by SPDJI. As of March 31, 2026, each bank in the Underlying Index had three-year average total assets that represented less than 5% of the three-year average total assets held by all banks in the Parent Index. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the banking industry or sector. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Europe ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P Europe 350TM (the “Underlying Index”), which measures the performance of the securities of leading companies in the following countries: Austria, Belgium, Denmark, Finland, France, Germany, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom (the “U.K.”). The market capitalization of constituent companies is adjusted to reflect the available float and, if necessary, any foreign investment restrictions. The stocks in the Underlying Index are chosen by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”) for market size, liquidity, industry group representation and geographic diversity. The Underlying Index is a subset of the S&P Global 1200, which is designed to measure the performance of large-capitalization stocks from major global markets, as determined by SPDJI. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services, financials and industrials industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares International Developed Small Cap Value Factor ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the FTSE Developed ex US ex Korea Small Cap Focused Value Index (the “Underlying Index”), which is provided by FTSE International Limited (the “Index Provider” or “FTSE”). The Underlying Index measures the performance of securities of international developed market small-capitalization companies, excluding the U.S. and Korea, with prominent value factor characteristics, as determined by the Index Provider. The Underlying Index is a subset of the FTSE Developed ex US ex Korea Small Cap Index (the “Parent Index”), which measures the performance of the small-capitalization segment of the international developed equity market, excluding the U.S. and Korea, as defined by the Index Provider. The construction of the Underlying Index begins with the Parent Index and excludes companies that are ranked in the least liquid 20% based on the 60-day average dollar value traded. The list of eligible constituents is then narrowed to exclude the top 20% of Parent Index constituents with the highest risk based on a 12-month trailing realized volatility. The list is further narrowed to exclude the top 20% of Parent Index constituents with the highest leverage, which is measured by comparing a company’s total debt to its total assets. Following these three initial screens, the remaining companies are evaluated to exclude companies with a negative sentiment score and negative price momentum. The sentiment score is calculated using the number of upgrades for earnings per share and the number of downgrades for earnings per share for a company's current and next fiscal year. A company with more downgrades for earnings per share than upgrades will have a negative sentiment score. Negative price momentum is determined based on monthly price returns over the trailing 12 months, excluding the latest month. The remaining companies are then ranked based on a weighted composite score of three value factor metrics: price-to-book, price-to-earnings and price-to-cash flow from operations (the “Composite Score”). The number of securities in the Underlying Index is approximately 25% of the number of securities in the Parent Index. The selected securities are weighted in proportion to their float-adjusted market capitalization with a country constraint of +/- 10% relative to the Parent Index to form a baseline or target composition (the “Target Index”). The Underlying Index is reviewed monthly and rebalanced to the Target Index if either of the following conditions is met: (i) the Underlying Index’s Composite Score is less than 90% of the Target Index’s Composite Score; or (ii) the Underlying Index has fewer than 20% of the number of securities by count of the Parent Index. If no rebalance is triggered, the component securities of the Underlying Index and their weights will remain unchanged. The Underlying Index may not rebalance for a period of time and is typically composed of 450 - 550 components. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services, financials and industrials industries or sectors. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the Underlying Index had 499 components. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by FTSE, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares JPX-Nikkei 400 ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Japan Exchange Group, Inc. and JPX Market Innovation & Research, Inc. (collectively referred to as the “JPX Group”) and Nikkei Inc. (the “Nikkei”) are the Fund’s index providers (collectively, the “Index Provider”). The Fund seeks to track the investment results of the JPX-Nikkei 400 Net Total Return Index (the “Underlying Index”), which is composed of (i) common stocks whose main market is the Tokyo Stock Exchange Prime Market, Standard Market or Growth Market and (ii) securities listed on Tokyo Stock Exchange Prime Market, Standard Market or Growth Market that are not common stocks but are regarded by the Index Provider as equivalent to common stocks, in each case if the inclusion in the Underlying Index is deemed to be “particularly necessary” as determined by the Index Provider. Companies deemed “particularly necessary” refer to companies that the Index Provider determines to have high appeal for investors and to meet requirements of global investment standards, such as efficient use of capital and investor-focused management perspectives. The Index Provider selects 400 constituents, based on: (i) trading value over the past three years, (ii) market value on the selection base date (the end of June), (iii) scoring by stock by three-year average returns on equity, cumulative operating profit and market value on the selection base date using specified weightings and (iv) qualitative factors tied to corporate governance and disclosure. The currency of the component securities of the Underlying Index is the Japanese yen. The Underlying Index may include large-, mid- and small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and industrials industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Index Provider is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares MSCI USA Quality GARP ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the MSCI USA Quality GARP Select Index (the “Underlying Index”), which was developed by MSCI Inc. (the “Index Provider” or “MSCI”). The Underlying Index is a subset of the MSCI USA Index (the “Parent Index”), which is designed to measure the performance of the large- and mid-capitalization segments of the U.S. equity market, as defined by the Index Provider. The Underlying Index’s “growth at a reasonable price” or “GARP” strategy seeks to measure the performance of securities in the Parent Index that exhibit stronger growth characteristics, with weighting based on relatively favorable value and quality characteristics. The Index Provider begins by calculating a “growth score” for each security in the Parent Index using five metrics: long-term forward earnings per share (“EPS”) growth rate; short-term forward EPS growth rate; current internal growth rate (based on return on equity and dividend payout metrics); long-term historical EPS growth trend; and long-term historical sales per share growth trend. The Index Provider then selects securities with higher growth scores until approximately 50% of the aggregate market capitalization of the Parent Index is reached, subject to certain constraints. The process for weighting the selected securities in the Underlying Index involves calculating a “tilt score” for each security. Two components of the tilt score are value and quality scores, which are calculated for each security relative to its peers within the corresponding Global Industry Classification Standards sector. The value score is based on three metrics: price-to-book value, forward price-to-earnings ratio, and the ratio of enterprise value to cash flow from operations. The quality score is based on three metrics: return on equity, debt-to-equity ratio, and earnings variability. A security’s tilt score is based on the following: • whether the security is in the top 50% or bottom 50% of the cumulative weight of the selected securities calculated using free float-adjusted market capitalization; • whether the security’s value score is in the top 50% or bottom 50% of the scores of the selected securities; and • the particular quartile in which the security’s quality score falls. Tilt scores are generally lower for securities with larger market capitalizations and higher for securities with more favorable value and quality scores. To determine a security’s weight in the Underlying Index, its tilt score is multiplied by the security’s market capitalization weight in the Parent Index. The maximum weight of any individual issuer is 5%. The Index Provider also applies constraints on turnover and on sector weights after the tilt score is applied, relative to the sector weights of the Underlying Index before the tilt score is applied (i.e., with sector weights based on the free float-adjusted market capitalization of the selected securities). The Underlying Index is rebalanced on a quarterly basis. As of March 31, 2026, the Underlying Index consisted of 148 component securities. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the technology industry or sector. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by MSCI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Nasdaq-100 ex Top 30 ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Nasdaq-100 ex Top 30 Index (the “Underlying Index”), which measures the performance of approximately 70 securities of domestic and international non-financial companies listed on the Nasdaq Global Select Market or the Nasdaq Global Market and selected based on market capitalization, as determined by Nasdaq, Inc. (the “Index Provider or “Nasdaq”). The Underlying Index is a subset of the Nasdaq-100 Index (the “Parent Index”) and represents securities ranked 31st through 100th in the Parent Index when ranked by market capitalization as determined by Nasdaq. The securities in the Underlying Index are weighted based on the market value of their outstanding shares subject to capping. The Underlying Index is reconstituted and rebalanced quarterly in March, June, September, and December. For capping purposes, at each quarterly rebalance, the weight of any single issuer will not exceed 22.5% of the Underlying Index; and the aggregate weight of issuers with individual weights exceeding 4.5% will not exceed 48% of the Underlying Index. Between rebalances, constituent weights may exceed these constraints due to fluctuations in market value, corporate actions, or other events that change the index composition. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and technology industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of Nasdaq, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Nasdaq Top 30 Stocks ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Nasdaq-100 Top 30 Index (the “Underlying Index”), which measures the performance of securities of the 30 largest domestic and international non-financial companies listed on the Nasdaq Global Select Market or the Nasdaq Global Market and selected based on market capitalization, as determined by Nasdaq, Inc. (the “Index Provider or “Nasdaq”). The Underlying Index is a subset of the Nasdaq-100 Index (the “Parent Index”). The securities in the Underlying Index are weighted based on the market value of their outstanding shares subject to capping. The Underlying Index is reconstituted and rebalanced quarterly in March, June, September, and December. For capping purposes, at each quarterly rebalance, the weight of any single issuer will not exceed 22.5% of the Underlying Index; and the aggregate weight of issuers with individual weights exceeding 4.5% will not exceed 48% of the Underlying Index. Between rebalances, constituent weights may exceed these constraints due to fluctuations in market value, corporate actions, or other events that change the index composition. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and technology industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of Nasdaq, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Texas Equity ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Russell Texas Equity Index (the “Underlying Index”), which is designed to measure the performance of equity securities of U.S. companies headquartered in the State of Texas, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a subset of the Russell 3000 Index, which measures the performance of the broad U.S. equity market, as defined by Russell. To be eligible for the Underlying Index, at each rebalance date, a security must be included in the Russell 3000 Index, have a float-adjusted market capitalization of at least $500 million, and have a three-month daily value traded of at least $3 million. However, an initial public offering that is included in the Russell 3000 Index pursuant to Russell's fast entry rules (“Fast Entry IPO”) is not measured against this daily volume average until it has traded for longer than three months. Eligible securities of companies that are headquartered in the State of Texas, as determined by Russell, are selected for inclusion in the Underlying Index and weighted by float-adjusted market capitalization. The Underlying Index is reconstituted and rebalanced quarterly, at the close of the fourth Friday in June and the third Friday of March, September and December. A Fast Entry IPO, however, is added to the Underlying Index when it is added to the Russell 3000 Index. The Underlying Index uses a capping methodology at each quarterly rebalance that limits the (1) weight of any single security to a maximum of 10% of the Underlying Index weight and (2) sum of all companies with a weight above 4.5% to an aggregate of 45% of the Underlying Index weight. The Underlying Index may include large-, mid- and small- capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and energy industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Top 20 U.S. Stocks ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P 500 Top 20 Select Index (the “Underlying Index”), which measures the performance of the 20 largest U.S. companies by float-adjusted market capitalization within the S&P 500 (the “Parent Index”) as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The securities in the Underlying Index are weighted based on the float-adjusted market value of their outstanding shares subject to capping. At each quarterly rebalance in March, June, September, and December, the weight of any single issuer will not exceed 22.5% of the Underlying Index; and the aggregate weight of issuers with individual weights exceeding 4.5% will not exceed 48% of the Underlying Index. Between rebalances, constituent weights may exceed these constraints due to fluctuations in market value, corporate actions, or other events that change the index composition. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the communications and technology industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares US Small Cap Value Factor ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Russell 2000 Focused Value Select Index (the “Underlying Index”), which is an equal-weighted equity index provided by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index measures the performance of small-capitalization U.S. companies with prominent value factor characteristics, as determined by the Index Provider. The Underlying Index is a subset of the Russell 2000® Index (the “Parent Index”), which measures the performance of the small-capitalization segment of the U.S. equity market, as defined by the Index Provider. The construction of the Underlying Index begins with the Parent Index and excludes companies that are ranked in the least liquid 20% (i.e. approximately 391 constituents) based on the 60-day average dollar value traded. The list of eligible constituents is then narrowed to exclude the top 20% of Parent Index constituents with the highest risk based on a 12-month trailing realized volatility. The list is further narrowed to exclude the top 20% of Parent Index constituents with the highest leverage, which is measured by comparing a company’s total debt to its total assets. Following these three initial screens, the remaining companies are evaluated to exclude companies with a negative sentiment score, which is calculated using the number of upgrades for earnings per share and the number of downgrades for earnings per share for a company's current and next fiscal year. A company with more downgrades for earnings per share than upgrades will have a negative sentiment score. The remaining companies are then ranked based on a weighted composite score of three value factor metrics: price-to-book, price-to-earnings and price-to-cash flow from operations (the “Composite Score”). The top 250 ranked stocks are selected and equally weighted to form a baseline or target composition (the “Target Index”). Industry exposure is capped so that the difference between an industry weight in the Target Index and in the Parent Index is less than 5%. The Underlying Index is reviewed monthly and will be rebalanced to the Target Index if there is a greater than 10% difference between an industry weight in the Underlying Index and in the Parent Index. It will also be rebalanced if either of the following conditions are met: (i) the Underlying Index’s Composite Score is less than 90% of the Target Index's Composite Score; or (ii) the Underlying Index has fewer than 200 securities. If no rebalance is triggered, the component securities of the Underlying Index and their weights will remain unchanged. The Underlying Index may contain fewer than 250 stocks and may not rebalance for a period of time. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services, financials and industrials industries or sectors. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the Underlying Index had 238 components. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Biotechnology ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the NYSE Biotechnology Index (the “Underlying Index”), which measures the performance of U.S.-listed securities of companies that are classified according to the ICE Uniform Sector Classification schema within the Biotechnology Sub-Industry Group (as determined by ICE Data Indices, LLC or its affiliates (collectively “Index Provider” or “IDI”)) and that also meet other eligibility criteria determined by the Index Provider, including minimum market capitalization and liquidity requirements. Companies classified within the Biotechnology Sub-Industry Group include those companies that are engaged in the research and development of therapeutic treatments but that are not focused on the commercialization and mass production of pharmaceutical drugs. The Biotechnology Sub-Industry Group also includes those companies that are engaged in the production of tools or systems that enable biotechnology processes. The Underlying Index may include large-, mid- and small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the biotechnology and healthcare industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by the Index Provider, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Expanded Tech Sector ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P North American Expanded Technology Sector Index (the “Underlying Index”), which measures the performance of U.S.-traded stocks from the technology sector and select technology-related companies from the communication services and consumer discretionary sectors in the U.S. and Canada, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index includes companies in the following categories: producers of sophisticated computer-related devices; providers of communications equipment and internet services; producers of computer and internet software; consultants for information technology; providers of computer services; semiconductors and semiconductor equipment manufacturers; and a select company engaging in content and information creation or distribution. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the communication services and technology industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Expanded Tech-Software Sector ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P North American Expanded Technology Software IndexTM (the “Underlying Index”), which measures the performance of U.S.-traded stocks from the software industry and select companies from the interactive home entertainment and interactive media and services sub-industries in the U.S. and Canada, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index includes companies that are producers of client/server applications; enterprise software; application software; home entertainment software; and media and services software. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the technology industry or sector. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Mortgage Real Estate ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the FTSE Nareit All Mortgage Capped Index (the “Underlying Index”), which measures the performance of the residential and commercial mortgage real estate, mortgage finance and savings associations sectors of the U.S. equity market, as defined by FTSE International Limited (the “Index Provider” or “FTSE”). The Underlying Index generally measures the performance of the residential and commercial mortgage real estate sector and generally invests all of its assets in REITs. If the number of constituents in the Underlying Index falls below 20, FTSE will consider companies from the mortgage finance and savings associations sectors for inclusion in the Underlying Index, and each company in the mortgage finance and savings associations sectors will be capped at 3% of the Underlying Index, and these sectors in the aggregate will not exceed 30% of the Underlying Index. As of March 31, 2026, approximately 100% of the market capitalization of the Underlying Index was represented by REITs. As of March 31, 2026, the Underlying Index included 32 component securities. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by FTSE, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares North American Natural Resources ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P North American Natural Resources Sector Index (the “Underlying Index”), which measures the performance of U.S.-traded stocks of natural resource-related companies in the U.S. and Canada, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index includes companies that are classified under the GICS® energy and materials sectors, excluding the chemicals industry, and steel sub-industry. The Underlying Index may include large-, mid- and small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the energy, materials and natural resources industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Preferred and Income Securities ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the ICE Exchange-Listed Preferred & Hybrid Securities Index (the “Underlying Index”), which measures the performance of a select group of exchange-listed, U.S. dollar-denominated preferred securities, hybrid securities and convertible preferred securities listed on the New York Stock Exchange (“NYSE”) or the Nasdaq Capital Market. The Underlying Index includes issuances of preferred stocks with amounts outstanding over $100 million, convertible preferred stock with at least $50 million face amount outstanding, and hybrid securities with at least $250 million face amount outstanding, that meet minimum maturity and other requirements, as applicable, as determined by ICE Data Indices, LLC (the “Index Provider” or “ICE Data”). In general, preferred stock is a class of equity security that pays a specified dividend that must be paid before any dividends can be paid to common stockholders and takes precedence over common stock in the event of a company’s liquidation. In general, a “hybrid” security refers to a security which combines both debt and equity characteristics. In general, hybrid securities included in the Underlying Index, like traditional preferred stock, have preference over the common stock within an issuer’s capital structure, and are issued and traded in a similar manner to traditional preferred stock. Like debt securities and preferred stock (but unlike common stock), issuers of hybrid securities included in the Underlying Index may make fixed, periodic payments to the holders of such securities. Like preferred stock, issuers of hybrid securities included in the Underlying Index have the ability to defer dividend payments and to extend such securities’ maturity dates. Although preferred stocks represent a partial ownership interest in a company, preferred stocks generally do not carry voting rights. Preferred stocks have economic characteristics similar to fixed-income securities. Preferred stocks and hybrid securities generally are issued with a fixed par value and pay dividends based on a percentage of that par value at a fixed or variable rate. Additionally, preferred stocks and hybrid securities often have a liquidation value that generally equals the original purchase price of such security at the date of issuance. The Underlying Index may include many different categories of preferred stock and hybrid securities, such as floating and fixed rate preferreds, fixed-to-floating rate securities, callable preferreds, convertible preferreds, cumulative and non-cumulative preferreds, certain capital securities, trust preferreds or various other preferred stock and hybrid securities. The total allocation to an individual issuer across the entire Underlying Index is limited to 4.75%. The Underlying Index uses a market capitalization weighted methodology subject to certain constraints and is rebalanced monthly. The Underlying Index may include large-, mid- or small-capitalization companies and includes preferred stocks and hybrid securities of non-U.S. issuers. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the financials industry or sector. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is owned, maintained and administered by the Index Provider, ICE Data, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Residential and Multisector Real Estate ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the FTSE Nareit All Residential Capped Index (the “Underlying Index”), which measures the performance of the residential apartments, manufactured homes, healthcare and self-storage real estate sectors of the U.S. equity market, as defined by FTSE International Limited (the “Index Provider” or “FTSE”). Only companies with a full market capitalization greater than US $100 million (on the date at which the data for the review are taken) will be included in the Underlying Index. As of March 31, 2026, a significant portion of the Underlying Index was represented by real estate investment trusts (“REITs”). The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by FTSE, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Semiconductor ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the NYSE Semiconductor Index (the “Underlying Index”), which measures the performance of the equity securities of the 30 largest U.S.-listed companies that are classified according to the ICE Uniform Sector Classification schema within the semiconductors industry (as determined by ICE Data Indices, LLC or its affiliates (collectively “Index Provider” or “IDI”)). Constituents must also meet other eligibility criteria determined by the Index Provider, including minimum market capitalization and liquidity requirements. Companies classified within the semiconductors industry include companies that either manufacture materials that have electrical conductivity (semiconductors) to be used in electronic applications or utilize LED and OLED technology. The semiconductors industry also includes companies that provide services or equipment associated with semiconductors such as packaging and testing. The Underlying Index may include large- and mid-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the semiconductor and technology industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by the Index Provider, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares U.S. Digital Infrastructure and Real Estate ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P Data Center, Tower REIT and Communications Equipment Index (the “Underlying Index”), which measures the performance of stocks of U.S.-listed companies, as well as U.S.-listed American Depository Receipts of foreign companies from developed markets, involved in the ownership and management of data centers, telecommunication towers, and related equipment, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index is a subset of the S&P Developed Broad Market Index and includes securities with a minimum float-adjusted market capitalization (“FMC”) of $300 million and a three-month Median Daily Value Traded (“MDTV”) of $2 million. The Underlying Index may include large-, mid- or small-capitalization companies. The Index Provider selects index constituents using a tiered approach consisting of Tier 1a, Tier 1b, and Tier 2, based on a company’s FactSet Revere Business Industry Classification System (“RBICS”) Focus Level 6 sub-industry, which defines each company’s primary line of business. The Index Provider selects companies which are classified within 17 sub-industries, which correspond with the following categories: Telecommunication Towers, Data Centers, Communications Equipment, Communications Semiconductors, and Data Storage Equipment. SPDJI classifies Tier 1a and Tier 1b companies as those belonging to the sub-industries of the Telecommunication Towers and Data Centers categories, respectively. The Index Provider classifies Tier 2 companies as those belonging to the sub-industries of the Communications Equipment, Communications Semiconductors and Data Storage Equipment categories. If there are 50 or more stocks classified as Tier 1a and Tier 1b, then all of Tier 1a and Tier 1b stocks are selected for inclusion in the Underlying Index and the Index Provider does not look to Tier 2 companies. If less than 50 stocks are classified as Tier 1a and Tier 1b, the largest eligible Tier 2 stocks, determined by the Index Provider according to the company’s FMC, are selected until the total stocks in the Underlying Index are capped at 50. The Index Provider requires the Tier 1a companies and Tier 1b companies, in aggregate, to have a minimum of 25% weight for each tier. Tier 2 companies may comprise up to 45% of the overall weight of the Underlying Index. Individual Tier 1a and Tier 1b securities are capped at 10%, and individual and Tier 2 securities are capped at 4.5%. Securities with weights greater than 4.5% will not in aggregate exceed 45% of the Underlying Index weight at rebalance. The Underlying Index is reviewed annually in December and rebalanced quarterly in March, June, and September. As of March 31, 2026, the Underlying Index had 25 securities and a significant portion of the index constituents were represented by securities of companies in the real estate and technology industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares U.S. Infrastructure ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the NYSE® FactSet U.S. Infrastructure Index (the “Underlying Index”), which is designed to measure the performance of equity securities of U.S. companies involved in U.S.-focused infrastructure activities (as determined by ICE Data Indices, LLC or its affiliates (the “Index Provider” or “IDI”)). The Underlying Index is composed of equity securities primarily listed on the New York Stock Exchange (“NYSE”), NYSE American or Nasdaq (excluding master limited partnerships, royalty trusts, business development companies, and American depositary receipts) that are classified to be under one of the 95 infrastructure-related industries as defined by FactSet Revere Business Industry Classification System (“RBICS”). Each company in the Underlying Index is classified as either Category 1 or Category 2, where Category 1 companies are infrastructure enablers and Category 2 are infrastructure asset owners and operators. Infrastructure enablers are potential beneficiaries of infrastructure investment in the U.S. Category 1 companies in the Underlying Index include companies in construction and engineering services, machineries, materials, and certain railroad transportation industries. Infrastructure asset owners and operators are companies associated with traditional equity infrastructure investing. Category 2 companies in the Underlying Index include companies in energy transportation and storage, and utilities. At the time of inclusion, eligible companies must derive 50% or more of their annual revenues from the U.S. The Underlying Index applies a 50% weighting to Category 1 and Category 2. Within each category, constituent weights are determined based on security-level float-adjusted market capitalization, subject to an individual constituent cap of 4%, with any excess weight redistributed among the remaining constituents in their respective category on a pro rata basis. The Underlying Index is reviewed and reconstituted annually in March. Constituent weights of the Underlying Index are rebalanced quarterly. The Underlying Index may include large-, mid-, and small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the industrials, materials and utilities industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is owned, maintained and administered by the Index Provider, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. The Underlying Index is compiled utilizing RBICS classifications licensed from FactSet Research Systems, Inc. (“FactSet”). RBICS is an industry classification system defined by FactSet, which has full discretion over the classification system and is not affiliated with the Index Provider, the Fund or BFA. The classification methodology utilized for RBICS combines both market-defined information and a bottom-up approach to classify companies from all economic sectors and industries, including those in the infrastructure industry. RBICS's assignment for companies is reviewed at least once a year, with corporate actions being monitored on an ongoing basis. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares U.S. Manufacturing ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P U.S. Manufacturing Select Index (the “Underlying Index”), which was developed by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index is designed to measure the performance of equity securities of U.S.-domiciled companies that are involved in manufacturing and manufacturing-related industries and that generate a certain amount of revenues in the U.S., among other eligibility criteria, as determined by SPDJI. The Underlying Index is a subset of the S&P United States BMI (the “Parent Index”), which includes all U.S.-domiciled companies, as determined SPDJI. All constituents of the Parent Index that meet the following eligibility criteria are included in the Underlying Index. A company must be classified in one of the following FactSet Revere Business Industry Classification System (“RBICS”) categories: Industrial Manufacturing (L2); Consumer Vehicles and Parts (L2); and a subset of the Electronic Components and Manufacturing (L2) category composed of Electronic Components (L3), Electronic Equipment Manufacturing (L3), Manufacturing Equipment and Services (L3), and Semiconductor Manufacturing Capital Equipment (L4). In the RBICS classification, L2 refers to a sector, L3 to a sub-sector, and L4 to an industry group. Companies in the Industrial Manufacturing and Consumer Vehicles and Parts categories must derive at least 50% of their annual revenues from the U.S. Companies in an Electronic Components and Manufacturing subset must derive at least 25% of their annual revenues from the U.S. In addition, eligible constituents must have a float-adjusted market capitalization of at least $2 billion and a three-month median daily value traded of at least $5 million. Constituents of the Underlying Index are weighted by float-adjusted market capitalization through an optimization process, with a 4% cap on individual securities. In addition, a 15% cap is applied to the Consumer Vehicles and Parts category, the Electronic Components and Manufacturing subset and each of the following subsets of the Industrial Manufacturing category: • Aerospace and Defense Manufacturing (L3) • Electrical Equipment and Power Systems (L3) • Transportation Equipment Manufacturing (L3) • Air, Liquid and Gas Control Equipment (L4) • Factory Automation Equipment (L4) • Industrial Machine Parts and Support Equipment (L4) • Natural Resource and Construction Machinery Makers (L4) • Other Machinery Manufacturing (L4) • Tools and Outdoor Care Equipment (L4) The Underlying Index is rebalanced quarterly and reconstituted annually. The Underlying Index may include large-, mid- and small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the industrials, manufacturing and technology industries or sectors. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares U.S. Telecommunications ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Russell 1000 Telecommunications RIC 22.5/45 Capped Index (the “Underlying Index”), which measures the performance of the telecommunications sector of the U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index will include large- and mid-capitalization companies. The Underlying Index is a subset of the Russell 1000 Index, which is a float-adjusted capitalization-weighted index of equity securities issued by approximately the 1,000 largest issuers in the Russell 3000 Index. The Russell 3000 Index measures the performance of the broad U.S. equity market, as defined by Russell. The Underlying Index uses a capping methodology to constrain at quarterly rebalance: (i) the weight of any single issuer (as determined by Russell) to a maximum of 22.5%, and (ii) the aggregate weight of all issuers that individually exceed 4.5% of the index weight to a maximum of 45%. The weight of one or more securities in the Underlying Index may exceed these constraints due to fluctuations in market value, corporate actions, or other events that change the index composition between quarterly rebalance dates. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the communications industry or sector. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Micro-Cap ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Russell Microcap Index (the “Underlying Index”), which measures the performance of the microcap sector of the U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a float-adjusted capitalization-weighted index and includes equity securities issued by issuers with total market capitalizations ranging from approximately $1 million to $3.2 billion, although this range may change from time to time. The Underlying Index consists of approximately the 1,000 smallest issuers in the Russell 3000® Index plus the next 1,000 smallest issuers in the equity universe as determined by Russell. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the financials and healthcare industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Russell 1000 ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Russell 1000® Index (the “Underlying Index”), which measures the performance of the large- and mid-capitalization sectors of the U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a subset of the Russell 3000 Index, which measures the performance of the broad U.S. equity market, as defined by Russell. The Underlying Index is a float-adjusted capitalization-weighted index of equity securities issued by the approximately 1,006 largest issuers in the Russell 3000 Index. As of March 31, 2026, the Underlying Index represented approximately 95% of the total market capitalization of the Russell 3000 Index. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and technology industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry. Diversification Policy. The Fund intends to be diversified in approximately the same proportion as the Underlying Index is diversified and to invest all or substantially all of its assets in components of the Underlying Index in approximately the same proportion as each component’s weighting in the Underlying Index. This diversification policy may limit the Fund’s ability to use representative sampling. The Fund may become “non-diversified,” as defined in the 1940 Act, solely as a result of a change in relative market capitalization or index weighting of one or more components of the Underlying Index. Shareholder approval will not be sought if the Fund becomes “non-diversified” due solely to a change in the relative market capitalization or index weighting of one or more components of the Underlying Index. The Fund discloses its portfolio holdings and weightings at www.iShares.com.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Russell 1000 Growth ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Russell 1000® Growth Index (the “Underlying Index”), which measures the performance of large- and mid-capitalization growth sectors of the U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a subset of the Russell 1000® Index, which measures the performance of the large- and mid-capitalization sector of the U.S. equity market, as defined by Russell. As of March 31, 2026, the Underlying Index represented approximately 66% of the total market value of the Russell 1000 Index. The Underlying Index measures the performance of equity securities of Russell 1000 Index issuers with higher price-to-book ratios, higher forecasted medium-term growth and higher sales-per-share historical growth relative to all issuers whose securities are included in the Russell 1000 Index. The Underlying Index is rebalanced quarterly after the close of business on the third Friday of March, June, September, and December. At each quarterly rebalance, the weight of any single company is capped at 22.5% of the index weight and the weight of all companies exceeding 4.5% weight of the index individually are capped at 45% of the index weight in aggregate. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and technology industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry. Diversification Policy. The Fund intends to be diversified in approximately the same proportion as the Underlying Index is diversified and to invest all or substantially all of its assets in components of the Underlying Index in approximately the same proportion as each component’s weighting in the Underlying Index. This diversification policy may limit the Fund’s ability to use representative sampling. The Fund may become “non-diversified,” as defined in the 1940 Act, solely as a result of a change in relative market capitalization or index weighting of one or more components of the Underlying Index. Shareholder approval will not be sought if the Fund becomes “non-diversified” due solely to a change in the relative market capitalization or index weighting of one or more components of the Underlying Index. The Fund discloses its portfolio holdings and weightings at www.iShares.com.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Russell 1000 Value ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Russell 1000® Value Index (the “Underlying Index”), which measures the performance of large- and mid-capitalization value sectors of the U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a subset of the Russell 1000® Index, which measures the performance of the large- and mid-capitalization sector of the U.S. equity market, as defined by Russell. As of March 31, 2026, the Underlying Index represented approximately 66% of the total market value of the Russell 1000 Index. The Underlying Index measures the performance of equity securities of Russell 1000 Index issuers with lower price-to-book ratios, lower sales-per-share historical growth and lower forecasted growth relative to all issuers whose securities are included in the Russell 1000 Index. The Underlying Index is rebalanced quarterly after the close of business on the third Friday of March, June, September, and December. At each quarterly rebalance, the weight of any single company is capped at 22.5% of the index weight and the weight of all companies exceeding 4.5% weight of the index individually are capped at 45% of the index weight in aggregate. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services, financials and industrials industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Russell 2000 ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Russell 2000® Index (the “Underlying Index”), which measures the performance of the small-capitalization sector of the U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a subset of the Russell 3000 Index, which measures the performance of the broad U.S. equity market, as defined by Russell. The Underlying Index is a float-adjusted capitalization-weighted index of equity securities issued by the approximately 1,933 smallest issuers in the Russell 3000 Index. As of March 31, 2026, the Underlying Index represented approximately 5% of the total market capitalization of the Russell 3000 Index. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the financials, healthcare and industrials industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Russell 2000 Growth ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Russell 2000 Growth Index (the “Underlying Index”), which measures the performance of the small-capitalization growth sector of the U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a subset of the Russell 2000® Index, which measures the performance of the small-capitalization sector of the U.S. equity market, as defined by Russell. As of March 31, 2026, the Underlying Index represented approximately 66% of the total market value of the Russell 2000 Index. The Underlying Index measures the performance of equity securities of Russell 2000 Index issuers with higher price-to-book ratios, higher sales-per-share historical growth and higher forecasted growth relative to all issuers included in the Russell 2000 Index. The Underlying Index is rebalanced quarterly after the close of business on the third Friday of March, June, September, and December. At each quarterly rebalance, the weight of any single company is capped at 22.5% of the index weight and the weight of all companies exceeding 4.5% weight of the index individually are capped at 45% of the index weight in aggregate. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the healthcare, industrials and technology industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Russell 2000 Value ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Russell 2000 Value Index (the “Underlying Index”), which measures the performance of the small-capitalization value sector of the U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a subset of the Russell 2000® Index, which measures the performance of the small-capitalization sector of the U.S. equity market, as defined by Russell. As of March 31, 2026, the Underlying Index represents approximately 62% of the total market value of the Russell 2000 Index. The Underlying Index measures the performance of equity securities of Russell 2000 Index issuers with lower price-to-book ratios, lower sales-per-share historical growth and lower forecasted growth relative to all issuers included in the Russell 2000 Index. The Underlying Index is rebalanced quarterly after the close of business on the third Friday of March, June, September, and December. At each quarterly rebalance, the weight of any single company is capped at 22.5% of the index weight and the weight of all companies exceeding 4.5% weight of the index individually are capped at 45% of the index weight in aggregate. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the financials industry or sector. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Russell 2500 ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Russell 2500TM Index (the “Underlying Index”), which measures the performance of the small- to mid-capitalization sector of the U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a subset of the Russell 3000 Index, which measures the performance of the broad U.S. equity market, as defined by Russell. The Underlying Index is a float-adjusted capitalization-weighted index of equity securities issued by approximately 2,427 of the smallest issuers in the Russell 3000 Index. As of March 31, 2026, the Underlying Index represented approximately 11% of the total market capitalization of the Russell 3000 Index. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the industrials industry or sector. The components of the Underlying Index are likely to change over time. Currently, the Fund seeks to achieve its investment objective by investing a substantial portion of its assets in the Underlying Fund. However, BFA is not required to invest any portion, or any particular percentage, of the Fund's assets in the Underlying Fund. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. Russell determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Russell 3000 ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Russell 3000® Index (the “Underlying Index”), which measures the performance of the broad U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a float-adjusted capitalization-weighted index of the approximately 2,939 largest public issuers domiciled in the U.S. and its territories, as determined by Russell. The Underlying Index may include large-, mid- and small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the technology industry or sector. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry. Diversification Policy. The Fund intends to be diversified in approximately the same proportion as the Underlying Index is diversified and to invest all or substantially all of its assets in components of the Underlying Index in approximately the same proportion as each component’s weighting in the Underlying Index. This diversification policy may limit the Fund’s ability to use representative sampling. The Fund may become “non-diversified,” as defined in the 1940 Act, solely as a result of a change in relative market capitalization or index weighting of one or more components of the Underlying Index. Shareholder approval will not be sought if the Fund becomes “non-diversified” due solely to a change in the relative market capitalization or index weighting of one or more components of the Underlying Index. The Fund discloses its portfolio holdings and weightings at www.iShares.com.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Russell Mid-Cap ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Russell Midcap Index (the “Underlying Index”), which measures the performance of the mid-capitalization sector of the U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a subset of the Russell 1000® Index, which measures the performance of the large- and mid-capitalization sectors of the U.S. equity market, as defined by Russell. As of March 31, 2026, the Underlying Index represented approximately 27% of the total market capitalization of the Russell 1000 Index. The Underlying Index is a float-adjusted capitalization-weighted index of equity securities issued by the 806 smallest issuers in the Russell 1000 Index. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and industrials industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Russell Mid-Cap Growth ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Russell Midcap Growth Index (the “Underlying Index”), which measures the performance of the mid-capitalization growth sector of the U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a subset of the Russell Midcap® Index, which measures the performance of the mid-capitalization sector of the U.S. equity market, as defined by Russell. As of March 31, 2026, the Underlying Index represented approximately 41% of the total market value of the Russell Midcap Index. The Underlying Index measures the performance of equity securities of Russell Midcap Index issuers with higher price-to-book ratios, higher sales-per-share historical growth and higher forecasted growth relative to all securities included in the Russell Midcap Index. The Underlying Index is rebalanced quarterly after the close of business on the third Friday of March, June, September, and December. At each quarterly rebalance, the weight of any single company is capped at 22.5% of the index weight and the weight of all companies exceeding 4.5% weight of the index individually are capped at 45% of the index weight in aggregate. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services, industrials and technology industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Russell Mid-Cap Value ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Russell Midcap Value Index (the “Underlying Index”), which measures the performance of the mid-capitalization value sector of the U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a subset of the Russell Midcap® Index, which measures the performance of the mid-capitalization sector of the U.S. equity market, as defined by Russell. As of March 31, 2026, the Underlying Index represented approximately 84% of the total market value of the Russell Midcap Index. The Underlying Index measures the performance of equity securities of Russell Midcap Index issuers with relatively lower price-to-book ratios, lower sales-per-share historical growth and lower forecasted growth relative to all securities included in the Russell Midcap Index. The Underlying Index is rebalanced quarterly after the close of business on the third Friday of March, June, September, and December. At each quarterly rebalance, the weight of any single company is capped at 22.5% of the index weight and the weight of all companies exceeding 4.5% weight of the index individually are capped at 45% of the index weight in aggregate. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the industrials industry or sector. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Russell Top 200 ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Russell Top 200® Index (the “Underlying Index”), which measures the performance of the largest capitalization sector of the U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a subset of the Russell 3000 Index, which measures the performance of the broad U.S. equity market, as defined by Russell. The Underlying Index is a float-adjusted capitalization-weighted index of equity securities issued by the approximately 200 largest issuers in the Russell 3000 Index. As of March 31, 2026, the Underlying Index represented approximately 75% of the total market capitalization of the Russell 3000 Index. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and technology industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry. Diversification Policy. The Fund intends to be diversified in approximately the same proportion as the Underlying Index is diversified and to invest all or substantially all of its assets in components of the Underlying Index in approximately the same proportion as each component’s weighting in the Underlying Index. This diversification policy may limit the Fund’s ability to use representative sampling. The Fund may become “non-diversified,” as defined in the 1940 Act, solely as a result of a change in relative market capitalization or index weighting of one or more components of the Underlying Index. Shareholder approval will not be sought if the Fund becomes “non-diversified” due solely to a change in the relative market capitalization or index weighting of one or more components of the Underlying Index. The Fund discloses its portfolio holdings and weightings at www.iShares.com.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Russell Top 200 Growth ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Russell Top 200 Growth Index (the “Underlying Index”), which measures the performance of the largest capitalization growth sector of the U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a subset of the Russell Top 200® Index, which measures the performance of the largest capitalization sector of the U.S. equity market, as defined by Russell. As of March 31, 2026, the Underlying Index represented approximately 74% of the total market value of the Russell Top 200 Index. The Underlying Index measures the performance of equity securities of Russell Top 200 Index issuers with higher price-to-book ratios, higher sales-per-share historical growth and higher forecasted growth relative to all securities included in the Russell Top 200 Index. The Underlying Index is rebalanced quarterly after the close of business on the third Friday of March, June, September, and December. At each quarterly rebalance, the weight of any single company is capped at 22.5% of the index weight and the weight of all companies exceeding 4.5% weight of the index individually are capped at 45% of the index weight in aggregate. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and technology industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry. Diversification Policy. The Fund intends to be diversified in approximately the same proportion as the Underlying Index is diversified and to invest all or substantially all of its assets in components of the Underlying Index in approximately the same proportion as each component’s weighting in the Underlying Index. This diversification policy may limit the Fund’s ability to use representative sampling. The Fund may become “non-diversified,” as defined in the 1940 Act, solely as a result of a change in relative market capitalization or index weighting of one or more components of the Underlying Index. Shareholder approval will not be sought if the Fund becomes “non-diversified” due solely to a change in the relative market capitalization or index weighting of one or more components of the Underlying Index. The Fund discloses its portfolio holdings and weightings at www.iShares.com.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Russell Top 200 Value ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the Russell Top 200 Value Index (the “Underlying Index”), which measures the performance of the largest capitalization value sector of the U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a subset of the Russell Top 200® Index, which measures the performance of the largest capitalization sector of the U.S. equity market, as defined by Russell. As of March 31, 2026, the Underlying Index represented approximately 61% of the total market value of the Russell Top 200 Index. The Underlying Index measures the performance of equity securities of Russell Top 200 Index issuers with lower price-to-book ratios, lower sales-per-share historical growth and lower forecasted growth relative to all securities in the Russell Top 200 Index. The Underlying Index is rebalanced quarterly after the close of business on the third Friday of March, June, September, and December. At each quarterly rebalance, the weight of any single company is capped at 22.5% of the index weight and the weight of all companies exceeding 4.5% weight of the index individually are capped at 45% of the index weight in aggregate. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services, financials and technology industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Core S&P 500 ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P 500 (the “Underlying Index”), which measures the performance of the large-capitalization sector of the U.S. equity market, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). As of March 31, 2026, the Underlying Index included approximately 88% of the market capitalization of all publicly traded U.S. equity securities. The securities in the Underlying Index are weighted based on the float-adjusted market value of their outstanding shares. The Underlying Index consists of securities from a broad range of industries. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and technology industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry. Diversification Policy. The Fund intends to be diversified in approximately the same proportion as the Underlying Index is diversified and to invest all or substantially all of its assets in components of the Underlying Index in approximately the same proportion as each component’s weighting in the Underlying Index. This diversification policy may limit the Fund’s ability to use representative sampling. The Fund may become “non-diversified,” as defined in the 1940 Act, solely as a result of a change in relative market capitalization or index weighting of one or more components of the Underlying Index. Shareholder approval will not be sought if the Fund becomes “non-diversified” due solely to a change in the relative market capitalization or index weighting of one or more components of the Underlying Index. The Fund discloses its portfolio holdings and weightings at www.iShares.com.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Core S&P Mid-Cap ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P MidCap 400 (the “Underlying Index”), which measures the performance of the mid-capitalization sector of the U.S. equity market, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). As of March 31, 2026, the Underlying Index included approximately 5% of the market capitalization of all publicly traded U.S. equity securities. The securities in the Underlying Index are weighted based on the float-adjusted market value of their outstanding shares, and have, as of March 31, 2026, a market capitalization between $1.6 billion and $27 billion at the time of inclusion in the Underlying Index, which may fluctuate depending on the overall level of the equity markets. The securities are selected by SPDJI based on certain factors including the Index Provider's liquidity measures. The Underlying Index consists of securities from a broad range of industries. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and industrials industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Core S&P Small-Cap ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P SmallCap 600 (the “Underlying Index”), which measures the performance of the small-capitalization sector of the U.S. equity market, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). As of March 31, 2026, the Underlying Index included approximately 2% of the market capitalization of all publicly traded U.S. equity securities. The securities in the Underlying Index are weighted based on the float-adjusted market value of their outstanding shares, and have, as of March 31, 2026, a market capitalization between $260 million and $8 billion at the time of inclusion in the Underlying Index, which may fluctuate depending on the overall level of the equity markets. The securities are selected by SPDJI based on certain factors including the Index Provider's liquidity measures. The Underlying Index consists of securities from a broad range of industries. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services, financials and industrials industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Core S&P Total U.S. Stock Market ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P Total Market Index™ (TMI) (the “Underlying Index”), which is comprised of the common equities included in the S&P 500® and the S&P Completion Index™. The Underlying Index consists of all U.S. common equities listed on the New York Stock Exchange (“NYSE”) (including NYSE Arca, Inc. (“NYSE Arca”) and NYSE American), the Nasdaq Global Select Market, the Nasdaq Global Market, the Nasdaq Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA and Cboe EDGX, Inc. The securities in the Underlying Index are weighted based on the float-adjusted market value of their outstanding shares. Securities with higher float-adjusted market value have a larger representation in the Underlying Index. The S&P 500 measures the performance of the large-capitalization sector of the U.S. equity market. The S&P Completion Index measures the performance of the U.S. mid-, small- and micro-capitalization sector of the U.S. equity market excluding S&P 500 constituents. As of March 31, 2026, the S&P 500 and the S&P Completion Index included approximately 88% and 12%, respectively, of the market capitalization of the Underlying Index. The Underlying Index may include large-, mid- and small- capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the technology industry or sector. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”), which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry. Diversification Policy. The Fund intends to be diversified in approximately the same proportion as the Underlying Index is diversified and to invest all or substantially all of its assets in components of the Underlying Index in approximately the same proportion as each component’s weighting in the Underlying Index. This diversification policy may limit the Fund’s ability to use representative sampling. The Fund may become “non-diversified,” as defined in the 1940 Act, solely as a result of a change in relative market capitalization or index weighting of one or more components of the Underlying Index. Shareholder approval will not be sought if the Fund becomes “non-diversified” due solely to a change in the relative market capitalization or index weighting of one or more components of the Underlying Index. The Fund discloses its portfolio holdings and weightings at www.iShares.com.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Core S&P U.S. Growth ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P 900 Growth Index (the “Underlying Index”), which measures the performance of the large- and mid- capitalization growth sector of the U.S. equity market, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Index Provider measures “growth” using three factors: sales growth, the ratio of earnings change to price, and momentum. The Underlying Index is a subset of the S&P 900, which combines the S&P 500® and the S&P MidCap 400®, and consists of those stocks in the S&P 900 exhibiting strong growth characteristics, as determined by SPDJI. The Underlying Index uses a capping methodology at each quarterly rebalance, that limits the weight of any single company to a maximum of 23% of the Underlying Index weight, and the sum of all companies with a weight above 4.8% to an aggregate of 50% of the Underlying Index weight. Additionally, if, on the third to last business day of March, June, September, or December a company has an index weight greater than 24% or the sum of the companies with weights greater than 4.8% exceeds 50%, a secondary reweighting is triggered with the rebalancing effective date after the close of the last business day of the month. As of March 31, 2026, the Underlying Index represented approximately 52% of the total market capitalization of the S&P 900. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the communications and technology industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry. Diversification Policy. The Fund intends to be diversified in approximately the same proportion as the Underlying Index is diversified and to invest all or substantially all of its assets in components of the Underlying Index in approximately the same proportion as each component’s weighting in the Underlying Index. This diversification policy may limit the Fund’s ability to use representative sampling. The Fund may become “non-diversified,” as defined in the 1940 Act, solely as a result of a change in relative market capitalization or index weighting of one or more components of the Underlying Index. Shareholder approval will not be sought if the Fund becomes “non-diversified” due solely to a change in the relative market capitalization or index weighting of one or more components of the Underlying Index. The Fund discloses its portfolio holdings and weightings at www.iShares.com.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares Core S&P U.S. Value ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P 900 Value Index (the “Underlying Index”), which measures the performance of the large- and mid-capitalization value sector of the U.S. equity market, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Index Provider measures “value” using three factors: the ratios of book value, earnings, and sales to price. The Underlying Index is a subset of the S&P 900, which combines the S&P 500® and the S&P MidCap 400®, and consists of those stocks in the S&P 900 exhibiting strong value characteristics, as determined by SPDJI. As of March 31, 2026, the Underlying Index represented approximately 48% of the total market capitalization of the S&P 900. The Underlying Index may include large- and mid-capitalization companies. The Underlying Index uses a capping methodology at each quarterly rebalance, that limits the weight of any single company to a maximum of 23% of the Underlying Index weight, and the sum of all companies with a weight above 4.8% to an aggregate of 50% of the Underlying Index weight. Additionally, if, on the third to last business day of March, June, September, or December a company has an index weight greater than 24% or the sum of the companies with weights greater than 4.8% exceeds 50%, a secondary reweighting is triggered with the rebalancing effective date after the close of the last business day of the month. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services, financials and technology industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares ESG Select Screened S&P 500 ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P 500 Sustainability Screened Index (the “Underlying Index”), which measures the performance of the large-capitalization sector of the U.S. equity market while excluding companies involved in controversial business activities and controversies, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index is a float-adjusted market capitalization-weighted equity index. The Index Provider constructs the Underlying Index starting with the S&P 500® and, based on its eligibility criteria, excludes companies with specific levels of involvement in the business of tobacco (both production and retail), controversial weapons, manufacturers and major retailers of small arms and companies involved in certain fossil-fuel related activity. The Index Provider uses data and research analysis from Trucost, S&P Global Business Involvement Screens, Sustainalytics and S&P Global Sustainable1 (“S1”) to identify a company’s involvement in certain controversial business activities and controversies. Companies with fossil fuel reserves from thermal coal, other coal, conventional and unconventional oil, natural gas, shale gas and other unspecified oil & gas sources, as defined and measured by Trucost, are excluded from the eligible universe of companies. Additionally, the following types of companies with specific levels of involvement based on revenue or ownership, as specified and measured by S&P Global Business Involvement Screens, are excluded from the eligible universe of companies: controversial weapons, small arms, tobacco products, oil sands, shale energy and thermal coal. Companies identified and deemed by Sustainalytics to be non-compliant with the United Nations Global Compact (the “UNGC”) are excluded from the eligible universe of companies. SPDJI’s proprietary controversies screening model monitors media and stakeholder stories on corporate controversies using pre-defined filters to aggregate and pre-screen content from various sources, including global, local, and regional news sources, governmental and non-governmental organizations, legal materials and industry publications. In cases where risks are presented, S1 releases a Media and Stakeholder Analysis (“MSA”), which includes a range of issues such as economic crime and corruption, fraud, illegal commercial practices, human rights issues, labor disputes, workplace safety, catastrophic accidents, and environmental disasters. SPDJI's Index Committee reviews constituents that have been identified by S1’s MSA to evaluate the potential impact of controversial company activities and may decide to remove a company from the Underlying Index. In the event of a removal, the company would not be eligible for reentry into the Underlying Index for one full calendar year beginning with the subsequent rebalancing. The Underlying Index rebalances quarterly, effective after the close of the third Friday of March, June, September and December. Exclusions applied to the Underlying Index are reviewed at each rebalancing reference date which is the third Friday of February, May, August and November respectively. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and technology industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. In addition, the Fund generally will invest at least 90% of its assets in the components of the Underlying Index. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares ESG Select Screened S&P Mid-Cap ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P MidCap 400 Sustainability Screened Index (the “Underlying Index”), which measures the performance of the mid-capitalization sector of the U.S. equity market while excluding companies involved in controversial business activities and controversies, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index is a float-adjusted market capitalization-weighted equity index. The Index Provider constructs the Underlying Index starting with the S&P MidCap 400® and, based on its eligibility criteria, excludes companies with specific levels of involvement in the business of tobacco (both production and retail), controversial weapons, manufacturers and major retailers of small arms and companies involved in certain fossil-fuel related activity. The Index Provider uses data and research analysis from Trucost, S&P Global Business Involvement Screens, Sustainalytics and S&P Global Sustainable1 (“S1”) to identify a company’s involvement in certain controversial business activities and controversies. Companies with fossil fuel reserves from thermal coal, other coal, conventional and unconventional oil, natural gas, shale gas and other unspecified oil & gas sources, as defined and measured by Trucost, are excluded from the eligible universe of companies. Additionally, the following types of companies with specific levels of involvement based on revenue or ownership, as specified and measured by S&P Global Business Involvement Screens, are excluded from the eligible universe of companies: controversial weapons, small arms, tobacco products, oil sands, shale energy and thermal coal. Companies identified and deemed by Sustainalytics to be non-compliant with the United Nations Global Compact (the “UNGC”) are excluded from the eligible universe of companies. SPDJI’s proprietary controversies screening model monitors media and stakeholder stories on corporate controversies using pre-defined filters to aggregate and pre-screen content from various sources, including global, local, and regional news sources, governmental and non-governmental organizations, legal materials and industry publications. In cases where risks are presented, S1 releases a Media and Stakeholder Analysis (“MSA”), which includes a range of issues such as economic crime and corruption, fraud, illegal commercial practices, human rights issues, labor disputes, workplace safety, catastrophic accidents, and environmental disasters. SPDJI’s Index Committee reviews constituents that have been identified by S1’s MSA to evaluate the potential impact of controversial company activities and may decide to remove a company from the Underlying Index. In the event of a removal, the company would not be eligible for reentry into the Underlying Index for one full calendar year beginning with the subsequent rebalancing. The Underlying Index rebalances quarterly, effective after the close of the third Friday of March, June, September and December. Exclusions applied to the Underlying Index are reviewed at each rebalancing reference date which is the third Friday of February, May, August and November respectively. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services, financials and industrials industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. In addition, the Fund generally will invest at least 90% of its assets in the components of the Underlying Index. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares ESG Select Screened S&P Small-Cap ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P SmallCap 600 Sustainability Screened Index (the “Underlying Index”), which measures the performance of the small-capitalization sector of the U.S. equity market while excluding companies involved in controversial business activities and controversies, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index is a float-adjusted market capitalization-weighted equity index. The Index Provider constructs the Underlying Index starting with the S&P SmallCap 600® and, based on its eligibility criteria, excludes companies with specific levels of involvement in the business of tobacco (both production and retail), controversial weapons, manufacturers and major retailers of small arms and companies involved in certain fossil-fuel related activity. The Index Provider uses data and research analysis from Trucost, S&P Global Business Involvement Screens, Sustainalytics and S&P Global Sustainable1 (“S1”) to identify a company’s involvement in certain controversial business activities and controversies. Companies with fossil fuel reserves from thermal coal, other coal, conventional and unconventional oil, natural gas, shale gas and other unspecified oil & gas sources, as defined and measured by Trucost, are excluded from the eligible universe of companies. Additionally, the following types of companies with specific levels of involvement based on revenue or ownership, as specified and measured by S&P Global Business Involvement Screens, are excluded from the eligible universe of companies: controversial weapons, small arms, tobacco products, oil sands, shale energy and thermal coal. Companies identified and deemed by Sustainalytics to be non-compliant with the United Nations Global Compact (the “UNGC”) are excluded from the eligible universe of companies. SPDJI’s proprietary controversies screening model monitors media and stakeholder stories on corporate controversies using pre-defined filters to aggregate and pre-screen content from various sources, including global, local, and regional news sources, governmental and non-governmental organizations, legal materials and industry publications. In cases where risks are presented, S1 releases a Media and Stakeholder Analysis (“MSA”), which includes a range of issues such as economic crime and corruption, fraud, illegal commercial practices, human rights issues, labor disputes, workplace safety, catastrophic accidents, and environmental disasters. SPDJI’s Index Committee reviews constituents that have been identified by S1’s MSA to evaluate the potential impact of controversial company activities and may decide to remove a company from the Underlying Index. In the event of a removal, the company would not be eligible for reentry into the Underlying Index for one full calendar year beginning with the subsequent rebalancing. The Underlying Index rebalances quarterly, effective after the close of the third Friday of March, June, September and December. Exclusions applied to the Underlying Index are reviewed at each rebalancing reference date which is the third Friday of February, May, August and November respectively. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services, financials and industrials industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. In addition, the Fund generally will invest at least 90% of its assets in the components of the Underlying Index. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares S&P 100 ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P 100® (the “Underlying Index”), which measures the performance of the large-capitalization sector of the U.S. equity market. It is a subset of the S&P 500® (the “Parent Index”) and consists of blue chip stocks from a diverse range of industries in the Parent Index with exchange listed options. As of March 31, 2026, the Underlying Index represented approximately 64% of the market capitalization of U.S. equities. As of March 31, 2026, stocks must have a market capitalization of at least $22 billion for initial inclusion in the Parent Index; this threshold and constituents' market capitalization may fluctuate depending on the overall level of the equity markets. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and technology industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”), which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry. Diversification Policy. The Fund intends to be diversified in approximately the same proportion as the Underlying Index is diversified and to invest all or substantially all of its assets in components of the Underlying Index in approximately the same proportion as each component’s weighting in the Underlying Index. This diversification policy may limit the Fund’s ability to use representative sampling. The Fund may become “non-diversified,” as defined in the 1940 Act, solely as a result of a change in relative market capitalization or index weighting of one or more components of the Underlying Index. Shareholder approval will not be sought if the Fund becomes “non-diversified” due solely to a change in the relative market capitalization or index weighting of one or more components of the Underlying Index. The Fund discloses its portfolio holdings and weightings at www.iShares.com.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares S&P 500 3% Capped ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P 500 3% Capped Index (the “Underlying Index”), which is based on a float-adjusted market capitalization-weighted parent index, the S&P 500 (the “Parent Index”). The Parent Index is designed to measure the performance of the large-capitalization segment of the U.S. equity market, as determined by the S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index seeks to measure the performance of companies in the Parent Index, subject to a 3% issuer weight cap. At each quarterly rebalance, companies with a weight greater than 3% will be capped at 3% and the excess weight will be proportionally redistributed across all uncapped companies. This is repeated iteratively until no company in the Underlying Index breaches the 3% cap. As of March 31, 2026, the Underlying Index consisted of securities from 503 U.S. companies, and a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services, financials and technology industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares S&P 500 ex S&P 100 ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P 500 ex-S&P 100 Select Index (the “Underlying Index”), which measures the capped market capitalization weighted performance of the large capitalization U.S. equities within the S&P 500 Index excluding companies within the S&P 100 Index as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The securities in the Underlying Index are weighted based on the float-adjusted market value of their outstanding shares subject to capping. For capping purposes, the Underlying Index will be rebalanced on a quarterly basis. At each quarterly rebalance in March, June, September, and December, the weight of any single issuer will not exceed 22.5% of the Underlying Index; and the aggregate weight of issuers with individual weights exceeding 4.5% will not exceed 48% of the Underlying Index. Between rebalances, constituent weights may exceed these constraints due to fluctuations in market value, corporate actions, or other events that change the index composition. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the financials, industrials and technology industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.
Strategy Portfolio Concentration [Text]	Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.
iShares S&P 500 Growth ETF
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund seeks to track the investment results of the S&P 500 Growth IndexTM (the “Underlying Index”), which measures the performance of the large-capitalization growth sector of the U.S. equity market. It is a subset of the S&P 500® (the “Parent Index”) and consists of those stocks in the Parent Index exhibiting the strongest growth characteristics, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”), a subsidiary of S&P Global, Inc. The growth characteristics used by the Index Provider include three-year change in earnings per share over price per share, three-year sales-per-share growth rate and momentum (12-month percentage share price change). To the extent that earnings, sales and price data is not available for the above-listed time periods, the Index Provider will use shorter time periods in accordance with the Index Provider’s methodology. The Underlying Index represented approximately 51.80% of the market capitalization of the Parent Index as of March 31, 2026. As of March 31, 2026, stocks must have a market capitalization of at least $5.2 billion for initial inclusion in the Parent Index; this threshold and constituents' market capitalization may fluctuate depending on the overall level of the equity markets. The Underlying Index uses a capping methodology at each quarterly rebalance, that limits the weight of any single company to a maximum of 23% of the Underlying Index weight, and the sum of all companies with a weight above 4.8% to an aggregate of 50% of the Underlying Index weight. Additionally, if, on the third to last business day of March, June, September, or December a company has an index weight greater than 24% or the sum of the companies with weights greater than 4.8% exceeds 50%, a secondary reweighting is triggered with the rebalancing effective date after the close of the last business day of the month. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the communications and technology industries or sectors. The components of the Underlying Index are likely to change over time. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA. In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received). The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry. Diversification Policy. The Fund intends to be diversified in approximately the same proportion as the Underlying Index is diversified and to invest all or substantially all of its assets in components of the Underlying Index in approximately the same proportion as each component’s weighting in the Underlying Index. This diversification policy may limit the Fund’s ability to use representative sampling. The Fund may become “non-diversified,” as defined in the 1940 Act, solely as a result of a change in relative market capitalization or index weighting of one or more components of the Underlying Index. Shareholder approval will not be sought if the Fund becomes “non-diversified” due solely to a change in the relative market capitalization or index weighting of one or more components of the Underlying Index. The Fund discloses its portfolio holdings and weightings at www.iShares.com.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund seeks to track the investment results of the S&P Asia 50TM Capped Index (the “Underlying Index”), which is a capped float-adjusted, market capitalization-weighted index that is designed to measure the performance of the 50 leading companies listed in four Asian countries or regions: Hong Kong, Singapore, South Korea and Taiwan, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index uses a capping methodology at each quarterly rebalance to limit: (i) the weight of any single issuer to a maximum of 22.5%, and (ii) the aggregate weight of all issuers that individually exceed 4.5% of the Underlying Index weight to maximum of 45%. In implementing this capping methodology, SPDJI may consider two or more companies as belonging to the same issuer where there is reasonable evidence of common control. The Underlying Index includes large-capitalization blue-chip companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the technology and financials industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce

exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the NYSE FactSet Global Blockchain Technologies Index (the “Underlying Index”), which is a rules-based, modified float-adjusted market capitalization-weighted equity index that measures the performance of equity securities issued by U.S. and non-U.S. companies that are involved in the development, innovation, and utilization of blockchain and crypto technologies. The Fund may invest in non-U.S. companies, including those located in emerging markets, without any limits consistent with the Underlying Index. ICE Data Indices, LLC, or its affiliates (the “Index Provider” or “IDI”), uses FactSet’s Revere Business Industry Classification System (“RBICS”) classifications to determine the eligible universe.

The Index Provider defines “blockchain” as technologies characterized by a shared, peer-to-peer, decentralized, and immutable ledger ideally suited for recording information. Information on the blockchain is secured through a validation process involving cryptography known as “mining,” which integrates a new set of information (known as a “block”) with all previous blocks on the ledger (thus creating a chain). One use of blockchain is “cryptocurrency,” which is a digital asset that typically uses blockchain’s decentralized and secured ledger as a method of verifying transactions and ownership. The Fund's investments will include companies involved in (a) cryptocurrency mining, (b) cryptocurrency trading and exchanges, (c) crypto-mining systems and/or (d) blockchain technology.

IDI begins with common equity securities (including depositary receipts) that have a market capitalization of $100 million or greater and a three-month average daily trading value (“ADTV”) of $1 million or greater and are from one of 43 eligible

countries (as disclosed in the Fund’s Statement of Additional Information (“SAI”)). From this starting universe, IDI selects, as “Tier 1” securities, companies generating 50% or more revenue from the following RBICS Focus Level 6 industries: Blockchain Technology; Cryptocurrency Mining; Cryptocurrency Trading and Exchanges; Cryptomining Hosting; Cryptomining Systems; and Enterprise Blockchain Technology.

In order to capture those companies that design and manufacture graphics processing unit (GPU) chips necessary for mining, IDI next selects, as “Tier 2” securities, companies in the following RBICS Focus Level 6 industries: A.I./Large Scale Processing Graphics Controller; Computer/Gaming Graphics Accelerator/Controller; Cryptomining Semiconductors; Data Center Graphics Accelerator/Controller; General Graphics Accelerator/Controller; Handheld Systems Graphics Accelerator/Controller; and Video Multimedia Semiconductors. Additionally for Tier 2, IDI selects the securities of companies that have blockchain-related ancillary businesses identified with the following Revere Hierarchy Focus industries: Blockchain Technology; Cryptocurrency Mining; Cryptocurrency Trading/Exchanges; Cryptomining Hosting; Cryptomining Systems; and Enterprise Blockchain Technology. The Fund will not invest in cryptocurrency (i) directly or (ii) indirectly through the use of derivatives on such assets.

The Underlying Index will have a minimum of 35 constituents at selection and will include all Tier 1 securities and a minimum of 10 Tier 2 securities, selected in descending order of float-adjusted market capitalization. The component securities of the Underlying Index are weighted by float-adjusted market capitalization with Tier 1 securities allocated a minimum weight of 75% in aggregate, subject to capping constraints. Each Tier 1 security is capped at 12%, and each Tier 2 security is capped at 4% of the Underlying Index, each at rebalance. Securities with weights greater than 4.5% shall not in aggregate exceed 45% of the Underlying Index weight at rebalance. Additionally, for any Tier 1 security whose constituent weight is greater than 10 times its three-month ADTV, its weight is determined by its liquidity weight instead of by float-adjusted market capitalization. The Index Provider determines the liquidity weight of a security as follows: index weight assigned to a security based on the relative three-month median daily value traded of the security compared to that measure for the overall index.

The Underlying Index is reviewed and reconstituted in March and September each year. Constituent weights of the Underlying Index are rebalanced quarterly. The Underlying Index may include large-, mid- and small-capitalization companies.

As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the blockchain, financials and technology industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is owned, maintained and administered by the Index Provider, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the STOXX Global Copper and Metals Mining Index (the “Underlying Index”), which has been developed by STOXX Ltd. (the “Index Provider” or “STOXX”). The Underlying Index is composed of U.S. and non-U.S. equity securities selected from the STOXX Global Copper Universe Index (the “Parent Index”). The Parent Index is composed of large-, mid- and small-capitalization stocks from developed and emerging markets. The Underlying Index captures the performance of equity securities of companies involved in copper and metal ore mining.

To construct the Underlying Index, the Index Provider begins with common equity securities (including depositary receipts) from the Parent Index and selects stocks that have a free-float market capitalization of $100 million or greater and a 3-month Average Daily Traded Volume (“ADTV”) equal to or exceeding $1 million. The Index Provider selects index constituents from the remaining companies based on tiered eligibility from Tier 1 to Tier 3. STOXX classifies Tier 1 securities as companies categorized as Copper Ore Mining under FactSet’s Revere Business and Industry Classification System (“RBICS”) Focus Level 6 Copper Ore Mining. The Index Provider’s methodology does not require a minimum number of Tier 1 securities. If there are fewer than 50 Tier 1 constituents, the shortfall is filled with Tier 2 constituents. Following the Tier 1 selection, the Index Provider ranks and selects, as Tier 2 eligible securities, companies with at least 25% revenues but less than 50% revenues derived from the RBICS Level 6 subindustry of Copper Ore Mining from highest to lowest revenue exposure. Companies are selected from the highest to the lowest revenue exposure until there are 50 stocks in the Underlying Index. Once 50 companies are reached after Tier 1 and/or 2, or there are fewer than 50 companies selected after Tier 1 and 2, the Index Provider selects companies it classifies as Tier 3. STOXX classifies Tier 3 securities as companies that are not in Tier 1 or

2 but are in the top 50% in terms of market share from Copper Ore Mining. The Index Provider defines market share by the percentile ranking of all companies in the Parent Index with at least $1 million in revenue from the RBICS Level 6 subindustry of Copper Ore Mining. Tier 3 securities are always included within the Underlying Index to ensure that companies with high dollar revenues from copper ore mining are represented.

The Index Provider applies the following weight limits: a maximum of 20% weighting to Tier 3 securities. The component securities in the Underlying Index are weighted by float-adjusted market capitalization with individual securities capped at 8% and securities with weights greater than 4.5% will not in aggregate exceed 45% of the Underlying Index weight at rebalance. As of March 31, 2026, the Underlying Index had 45 securities and all of the index constituents were represented by securities of companies in the materials industry or sector. The Underlying Index may include large-, mid-and small-capitalization companies. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries: Australia, Brazil, Canada, China, Indonesia, Japan, Mexico, Poland, Saudi Arabia, United Kingdom (the “U.K.”) and the U.S. The Underlying Index will be reviewed and reconstituted on an annual basis in September and rebalanced quarterly.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index and Parent Index are sponsored by STOXX, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the S&P Emerging Markets Plus Infrastructure IndexTM (the “Underlying Index”), which is designed to track the performance of 30 of the largest publicly listed companies in the infrastructure industry in emerging markets, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index includes three distinct infrastructure sub-sectors: energy, transportation and utilities. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries or regions: Brazil, China, Mexico, Qatar,

South Korea, Thailand and the United Arab Emirates. Companies domiciled in an emerging or developed market country are eligible for inclusion as long as the majority of the company's revenues are derived from emerging market operations. Based on the methodology, constituents must have a minimum total market capitalization as of the rebalancing reference date of $250 million and a minimum float adjusted market capitalization as of the rebalancing reference date of $200 million. Constituents must also have a 3-month average daily value traded of greater than $1 million. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the energy, industrials and utilities industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry. Because all of the securities included in the Underlying Index are issued by utility, energy and transportation infrastructure companies, the Fund will be concentrated in the infrastructure industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry. Because all of the securities included in the Underlying Index are issued by utility, energy and transportation infrastructure companies, the Fund will be concentrated in the infrastructure industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the FTSE Green Revenues Select Infrastructure and Industrials Index (the “Underlying Index”), which has been developed by FTSE International Limited (the “Index Provider” or “FTSE”). The Underlying Index is composed of U.S. and non-U.S. equity securities selected from the FTSE Global All Cap Index (the “Parent Index”). The Parent Index is composed of large-, mid- and small-capitalization stocks from developed and emerging markets. The Underlying Index captures eligible infrastructure and industrials solutions that aim to support energy efficiency and emissions mitigation, pollution reduction, or land and resource optimization. The Underlying Index is designed to reflect the equity performance of U.S. and non-U.S. companies that derive at least 40% of their combined annual green revenues in aggregate from a combination of 29 selected FTSE Green Revenues Classification System (“GRCS”) micro-sectors (as defined by the Index Provider), which were determined based on relevance to the three key themes: (1) energy efficiency and emissions mitigation, (2) pollution reduction, or (3) land and resource optimization.

The energy efficiency and emissions mitigation theme includes: (i) energy efficient infrastructure solutions such as energy or resource efficient products for buildings, semiconductor and microgrid controllers, and smart grid components; (ii) clean transportation or freight solutions including electric or magnetic trains, low emissions buses, airplanes, and ships; and (iii) emissions mitigation infrastructure solutions such as carbon capture and particle or emissions reduction devices. The

pollution reduction theme includes: (i) clean water solutions such as wastewater or stormwater management, water distribution, monitoring and purification, and advanced irrigation; (ii) solutions for land pollution including sustainable waste management and land decontamination services and devices; and (iii) air pollution solutions across industrial, transport, and atmospheric settings. The land and resource optimization theme includes: (i) solutions that minimize land-use and local environmental impacts such as environmental testing and desalination equipment; and (ii) recycling solutions and solutions that optimize natural resource-use including advanced and low-weight materials, smart city design, and engineering.

The Index Provider begins with the Parent Index and excludes the securities of companies that it identifies as being involved in the business of tobacco, companies involved with controversial weapons, producers and retailers of civilian firearms, and companies involved in thermal coal mining, thermal coal-based power generation or the extraction of oil sands. Certain exclusions (e.g., controversial weapons or manufacturing tobacco products) are categorical, and others are based on percentage of revenue or ownership thresholds. Additionally, the Index Provider excludes companies that it determines are involved in controversies related to the ten United Nations Global Compact (“UNGC”) principles, which are classified into four categories: human rights, labor, environment and anti-corruption. The Index Provider also excludes companies with less than $100 million free float adjusted market capitalization or less than $1 million average daily trading volume over the prior sixty trading-day period. Only companies from the Utilities, Industrials, and Basic Materials Industry Classification Benchmark (ICB) sectors are eligible for inclusion.

The Index Provider includes companies that, at the time of inclusion, derive at least 40% of their combined annual green revenues in aggregate from a combination of 29 selected GRCS micro-sectors (as defined by the Index Provider), which were determined based on relevance to the three key themes. The Index Provider assesses and measures a company’s green revenues under the GRCS based on the following two categories: (1) disclosure of information when a company has sufficient disclosure to measure green revenues and (2) company-specific estimates when a company has limited green revenue disclosures but there is additional non-revenue data such as production volumes, or relevant market or peer data such as market share of a product that can form a reasonable basis for estimating green revenues. The Underlying Index includes companies identified by the Index Provider as deriving green revenue from Tier 1 activities (i.e., activities with significant and clear environmental benefits, such as solar) and Tier 2 activities (i.e., activities with more limited but net positive environmental benefits, such as water utilities) but excludes companies deriving revenue from Tier 3 activities (i.e., activities with some environmental benefits but overall net neutral or negative, such as nuclear).

The Index Provider weights the securities by free float adjusted market-capitalization with a 6% cap for individual stocks. The sum of all weights of issuers above 4.5% will not exceed 45%. The Underlying Index is reviewed and reconstituted semi-annually in March and September and rebalanced quarterly in March, June, September, and December. New constituents will be eligible for inclusion if they have green revenues of 40% or more. Current constituents will be removed if their green revenues fall below 35%.

As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries or regions: Australia, Belgium, Brazil, Canada, Chile, China, France, Germany, India, Japan, the Netherlands, Norway, Qatar, Saudi Arabia, Spain, Sweden, Switzerland, Taiwan, the United Kingdom (the “U.K.”), and the U.S. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the industrials, materials and utilities sectors. As of March 31, 2026, the Underlying Index had 79 components. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by FTSE, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Morningstar Global Artificial Intelligence Select Index (the “Underlying Index”), which measures the performance of equity securities issued by companies with exposure to artificial intelligence (“AI”) technologies, including generative AI, AI data and infrastructure, AI software, and AI services (each an “AI subtheme”), as determined by the equity research team of Morningstar, Inc. (the “Index Provider” or “Morningstar”).

The Underlying Index is a subset of the Morningstar Global Markets Index (the “Parent Index”), which represents approximately the top 97% of the global investable equity market capitalization. The eligible universe of securities in the Underlying Index includes the Parent Index, excluding companies in India or the People’s Republic of China and companies with an average three-month trailing daily trading volume of less than $2 million and float market capitalization of less than $300 million.

The Index Provider scores companies in the eligible universe on a four-point thematic exposure scale based on exposure to at least one AI subtheme and then assigns each company to one of three tiers (i.e., Tier 1, Tier 2 or Tier 3). Morningstar considers each company’s role in the AI subtheme value chain, expected net profit increase from exposure to at least one AI subtheme and the portion of revenue expected to be derived from each AI subtheme over the next five years. Many of the companies included in the eligible universe of securities for the Underlying Index may not currently earn the majority of their income from AI-related activities. Companies with a score of 2 or higher on the generative AI subtheme are assigned to Tier 1, and the

rest are classified as either Tier 2 or Tier 3. All companies with a score of at least 2 across any one of the three other AI subthemes (i.e., Al data and infrastructure, Al services, or Al software) are assigned to Tier 2. Companies with an aggregate score of at least 3 across all four AI subthemes are also assigned to Tier 2. All remaining companies with a non-zero score on at least one AI subtheme are assigned to Tier 3. The Index Provider then ranks the companies to emphasize thematic purity and exposure to the generative AI subtheme according to the following ranking criteria (in descending order):

• Tier 1 companies are preferred over Tier 2 companies, and Tier 2 companies are preferred over Tier 3 companies.

• Generative AI subtheme score (highest to lowest).

• Aggregate score across all 4 subthemes (highest to lowest).

• Current index constituents are given preference.

• Current total market capitalization, with preference to smaller market capitalization over larger market capitalization.

Morningstar generally includes the top 50 companies in the Underlying Index, subject to adjustments for corporate actions.

The Underlying Index is weighted by float-adjusted market capitalization; however, the aggregate weight of Tier 3 securities cannot exceed 10%, and the excess weight is redistributed proportionally to Tier 1 and Tier 2 securities. Additionally, the weight of any one Tier 1, Tier 2 or Tier 3 security, respectively, cannot exceed 6%, 3% and 3%, with the excess weight distributed proportionally within each Tier. If the aggregate weight of securities with a weight of at least 4.5% exceeds 22.5%, then Morningstar caps the weight of any one security at 6% and the sum of securities at 22.5%, with excess weight redistributed proportionally within each Tier. The Index Provider will review constituent weights daily to ensure the combined weight of all constituents with individual weights above 5% does not exceed 25%. If this cap is breached, the Index Provider will cap the constituent with the smallest weight above 5% to 4.5%, along with and any other constituent with a weight between 4.5% and 5%. This process will be repeated iteratively until the sum of the weights above 5% are less than 25%, with excess weight redistributed to constituents with weights below the 4.5% limit.

The Underlying Index is rebalanced quarterly on the third Friday of March, June and September (effective the following business day) and reconstituted and rebalanced annually following the third Friday of December (effective the following business day). To remain in the Underlying Index, current constituents must have an average three-month daily trading volume of at least $1.6 million and a free-float market capitalization of at least $240 million at the annual reconstitution.

As of March 31, 2026, the Underlying Index consisted of 50 issuers from the following nine countries or regions: Australia, Canada, France, Israel, Japan, South Korea, Taiwan, United Arab Emirates and the U.S. The Underlying Index may include large-, mid- and small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the technology and AI industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by Morningstar which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Board of the Trust approved the closure and liquidation of the Fund. After market close on August 12, 2026, the Fund will cease the creation and redemption of Creation Units (as defined herein). Trading in the Fund will be halted prior to market open on August 13, 2026. Proceeds of the liquidation are scheduled to be sent to Fund shareholders on or around August 17, 2026 (the “Liquidation Date”).

While the Fund is in the process of liquidating its portfolio, which is anticipated to commence prior to August 12, 2026, the Fund will hold cash and securities that will not be consistent with its investment objective and strategies and is likely to incur higher tracking error than is typical for the Fund. Furthermore, the Trust cannot assure that there will be a trading market for Fund shares between market close on August 12, 2026 and the Liquidation Date because Fund shares will not be traded on NYSE Arca, Inc. (“NYSE Arca”) during that period.

Shareholders may sell their holdings of the Fund on NYSE Arca until market close on August 12, 2026 and may incur the usual and customary brokerage commissions associated with the sale of Fund shares. As of the Liquidation Date, shares of the Fund will be individually redeemed. If you hold Fund shares on the Liquidation Date, the Fund will automatically redeem

your shares for cash based on the net asset value of the Fund as of the close of business on August 12, 2026, which will include any dividends or distributions calculated as of that date.

Prior to the Liquidation Date, the Fund seeks to track the investment results of the Morningstar© Global Metaverse & Virtual Interaction Select IndexSM (the “Underlying Index”), which measures the performance of equity securities issued by U.S. and non-U.S. companies that enable the “metaverse” and virtual interactions, as determined by Morningstar or its affiliates (“Morningstar” or the “Index Provider”). The Index Provider defines “metaverse” as a three-dimensional immersive digital world.

Morningstar evaluates companies based on five-year net profit and revenue projections as a producer or supplier with respect to six themes:

• Metaverse Platforms: Technologies that facilitate virtual interactions across a high volume of users, combining elements of 3D rendering and simulation software, wearable technology, immersive gaming, enhanced social media, and digital assets and payments.

• Wearable Technology and VR/AR: Virtual reality (“VR”) is the use of computer technology to create the effect of an interactive three-dimensional world in which the objects have a sense of spatial presence. Augmented reality (“AR”) is an enhanced version of reality created by the use of technology to overlay digital information on an image of something being viewed through a device.

• Enhanced Social Media: Interactive digital channels, enhanced by the use of VR and AR platforms, that allow users to create and share content.

• Immersive Gaming: All-encompassing online games that many players can play simultaneously and the associated tools and hardware that facilitate their development.

• 3D Rendering and Simulation Software: Software and tools leveraged by businesses, consumers, and brands to build and develop content for VR and AR platforms.

• Digital Assets and Payments: A digital asset is a collection of binary data which is self-contained, uniquely identifiable, and has a value, such as non-fungible tokens and cryptocurrencies. Digital payments are transfers of value from one payment account to another by use of a digital device, with no exchange of cash. This theme targets companies that facilitate the use of payment solutions or digital assets in the metaverse or enhanced shared virtual spaces.

The Fund does not invest in cryptocurrencies or other digital assets directly or indirectly through the use of derivatives on such assets.

To construct the Underlying Index, the Index Provider begins with the Morningstar Global Markets ex-India Index and excludes companies with an average three-month trailing daily trading volume of less than $2 million or a free float market capitalization of less than $300 million. Current index constituents are ineligible if they have average three-month daily trading volume of less than $1.5 million or a free-float market capitalization less than $200 million at rebalance.

To be eligible for inclusion, a company must be classified by the Index Provider as either a producer of goods or services related to a theme or a supplier of such producers. In addition, the issuer must have current exposure from at least one theme and, as determined by Morningstar, must be highly likely to experience at least a 5% increase in net profit over the next five years from exposure to that theme.

Morningstar research analysts estimate the percentage of total revenue that a company will derive over the next five years from its exposure to each theme of the Underlying Index. In making these projections, the research analysts may take into account, among other things, financial statements, historical growth rates, competitive and industry analyses, macroeconomic factors, and news and other data sources. Based on the analysts’ revenue projections, each company is assigned an “exposure score” for each theme as follows:

• Score of 0: Less than 10% of the issuer’s total revenue

• Score of 1: 10-25% of the issuer’s total revenue
• Score of 2: 25-50% of the issuer’s total revenue
• Score of 3: Greater than 50% of the total revenue of an issuer that is a supplier
• Score of 4: Greater than 50% of the total revenue of an issuer that is a producer
A Morningstar committee reviews the assigned scores to help ensure internal consistency.

If a company has an exposure score of zero for each theme, it is excluded from the Underlying Index. The remaining potential constituents are designated as Tier 1 or Tier 2. Tier 1 issuers are those with an aggregate score (the sum of all exposure scores) of 3 or more and at least an aggregate, non-overlapping revenue exposure of 25% across all themes relative to company-wide revenue. Tier 2 issuers are those with an aggregate score of less than 3. Morningstar ranks Tier 2 issuers with preference given to higher aggregate score, number of themes with higher scores, current index constituents, and smaller market capitalization.

All Tier 1 constituents are selected for the Underlying Index. However, if there are fewer than 50 Tier 1 constituents, the shortfall is filled with Tier 2 constituents, and the Underlying Index is capped at 50 constituents.

Constituents are float-adjusted market capitalization-weighted with a minimum 80% weight, in aggregate, allocated to Tier 1 constituents. Individual Tier 1 constituents have a 6% cap, while individual Tier 2 constituents have a 3% cap. Constituents with an aggregate score of 1, or an aggregate score of 2 of which one point comes from Metaverse Platforms, are constrained to 10% of the Underlying Index. Of the 10% weight, at most only 5% can be in sectors outside of technology or communications. At each rebalance, issuers with weights over 4.5% shall not in aggregate exceed 45% of the Underlying Index. In case there is no feasible solution for capping, the Index Provider will loosen constraints until a solution can be found, such as reducing the minimum weight of Tier 1 constituents in 1% increments until that capping is feasible.

The Underlying Index is reconstituted each December and rebalanced quarterly. The themes are reviewed annually by the Index Provider and are subject to change as they evolve, and new themes emerge.

The Underlying Index may include large-, mid- and small-capitalization companies and may change over time. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the communications, financials and technology industries or sectors. As of March 31, 2026, the Underlying Index included 41 constituents from the following countries or regions: China, France, Japan, South Korea, the Netherlands and the U.S.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by Morningstar, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Nifty 50 IndexTM (the “Underlying Index”), which measures the equity performance of the top 50 companies by free float market capitalization whose equity securities trade in the Indian securities markets, as determined by NSE Indices Ltd. (formerly known as India Index Services & Products Limited) (the “Index Provider” or “NSEI”). As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and financials industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying

Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Underlying Index is a product of NSEI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

This Prospectus and the SAI have not been filed with the Securities and Exchange Board of India (“SEBI”), and SEBI will not in any manner vouch for the financial soundness of the Fund, BFA or the Portfolio Managers (as defined below), or for the adequacy of the statements made in this Prospectus and the SAI. BFA and the Portfolio Managers will not be registered with SEBI.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Morningstar® Global ex-US Dividend Growth IndexSM (the “Underlying Index”), which is a dividend dollars weighted index that seeks to measure the performance of international equities selected based on a consistent history of growing dividends, as determined by Morningstar Inc. (the “Index Provider” or “Morningstar”). The Underlying Index is a subset of the Morningstar® Global Markets ex-US IndexSM, which is a diversified broad market index that represents approximately 97% of the market capitalization in international developed and emerging markets, as defined by Morningstar. Eligible companies for the Underlying Index must pay a dividend and not be classified as a REIT, must have at least five years of uninterrupted annual dividend growth and must have an earnings payout ratio of less than 75%. A company that is in the top decile of dividend yield for its region, as defined by the Index Provider (for example, Developed Asia Pacific, Developed Europe, Middle East and Africa, Developed North America ex-US (Canada) and Emerging Markets), is excluded from the Underlying Index. The Underlying Index is weighted by dividend dollars (total value of dividends paid out over the past trailing 12 months) and constrained by capping each company at 3%.

The Underlying Index was composed of securities of companies in 34 countries as of March 31, 2026. The Underlying Index may include large-, mid- and small- capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and financials industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by Morningstar, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the S&P Latin America 40TM (the “Underlying Index”), which is composed of selected equities trading on the exchanges of five Latin American countries. The Underlying Index includes securities that S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”), a subsidiary of S&P Global, Inc., considers to be highly liquid from major economic sectors of the Mexican and South American equity markets. Companies from Brazil, Chilé, Colombia, Mexico and Peru are represented in the Underlying Index. The Underlying Index includes large capitalization blue-chip companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the financials and materials industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in

the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the STOXX Global Lithium Miners and Producers Index (the “Underlying Index”), which has been developed by STOXX Ltd. (the “Index Provider” or “STOXX”). The Underlying Index is composed of U.S. and non-U.S. equity securities selected from the STOXX Global Lithium Universe Index (the “Parent Index”). The Parent Index is composed of large-, mid- and small-capitalization stocks from developed and emerging markets. The Underlying Index captures the performance of equity securities of companies involved in lithium ore mining and/or lithium compounds manufacturing.

To construct the Underlying Index, the Index Provider begins with common equity securities from the Parent Index and selects stocks that have a free-float market capitalization of $100 million or greater, 3-month Average Daily Traded Volume (“ADTV”) equal to or exceeding $1 million and have FactSet’s Revere Business and Industry Classification System (“RBICS”) Focus Level 1 classification of Non-Energy Materials. The following RBICS sectors are defined for the selection process: Africa Lithium Ore Mining, Australia including Oceania Lithium Ore Mining, Diversified Lithium Ore Mining, Europe Lithium Ore Mining, Latin America Lithium Ore Mining, North America Lithium Ore Mining, Pan-Americas Lithium Ore Mining, Pan-Asia/Pacific Lithium Ore Mining and Rest of Asia/Pacific Lithium Ore Mining (the “Lithium Ore Mining RBICS Focus Level 6” or “Lithium Ore Mining RBICS” sectors).

From the remaining securities, the Index Provider selects Tier 1 securities according to the following steps: (i) companies categorized as one of the Lithium Ore Mining RBICS sectors (ii) companies categorized as Lithium Compounds

Manufacturing under RBICS Focus Level 6 (or “Lithium Compounds Manufacturing” sub-category) and (iii) companies that derive at least 50% combined revenues from the Lithium Ore Mining RBICS sectors and Lithium Compounds Manufacturing sub-category.

Following the Tier 1 selection, the Index Provider ranks and selects, as Tier 2 eligible securities, companies with at least 25% but less than 50% combined revenues derived from the Lithium Ore Mining RBICs sectors and Lithium Compounds Manufacturing sub-category from highest to lowest revenue exposure. All Tier 1 constituents are selected for the Underlying Index. However, if there are fewer than 50 Tier 1 constituents, the shortfall is filled with Tier 2 constituents, and the Underlying Index is capped at 50 constituents. The Index Provider’s methodology does not require a minimum number of Tier 1 securities.

The Index Provider applies tier group weight limits. For Tier 1, the Index Provider applies at least a 25% weighting to the categories within steps (i) and (ii) above, as well as a maximum weight of 25% to Tier 2 securities. In addition, the Index Provider applies at least a 90% weighting to High Exposure Companies, which it defines as a combination of (i) Tier 1 constituents and (ii) companies that are in the top twenty percent in terms of market share. Market share is defined by STOXX as the percentile ranking of all companies in the Parent Index with combined revenue from the Lithium Ore Mining RBICS sectors and Lithium Compounds Manufacturing sub-category greater than or equal to 1 million USD. The component securities in the Underlying Index are weighted by float-adjusted market capitalization with individual securities capped at 8% and securities with weights greater than 4.5% will not in aggregate exceed 45% of the Underlying Index weight at rebalance.

As of March 31, 2026, the Underlying Index had 34 securities and a significant portion of the index was represented by securities of companies in the materials industry or sector. The Underlying Index may include large-, mid- and small-capitalization companies. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries: Australia, Chile, China, South Korea, and the U.S. The Underlying Index will be reviewed and reconstituted on an annual basis in September and rebalanced quarterly.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index and Parent Index are sponsored by STOXX, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the S&P Global 100TM (the “Underlying Index”), which is designed to measure the performance of the stocks of approximately 100 large-capitalization global companies. The stocks in the Underlying Index are expected to be highly liquid and represent some of the largest multinational businesses in the world. The Underlying Index is a subset of the S&P Global 1200TM and contains 102 common stocks as of March 31, 2026, screened for sector representation, liquidity and size. The market capitalization of constituent companies is adjusted to reflect the available float and, if necessary, any foreign investment restrictions. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries: Australia, China, France, Germany, Japan, the Netherlands, South Korea, Spain, Switzerland, the United Kingdom (the “U.K.”) and the U.S. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and technology industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce

exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”), which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Diversification Policy. The Fund intends to be diversified in approximately the same proportion as the Underlying Index is diversified and to invest all or substantially all of its assets in components of the Underlying Index in approximately the same proportion as each component’s weighting in the Underlying Index. This diversification policy may limit the Fund’s ability to use representative sampling. The Fund may become “non-diversified,” as defined in the 1940 Act, solely as a result of a change in relative market capitalization or index weighting of one or more components of the Underlying Index. Shareholder approval will not be sought if the Fund becomes “non-diversified” due solely to a change in the relative market capitalization or index weighting of one or more components of the Underlying Index. The Fund discloses its portfolio holdings and weightings at www.iShares.com.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the S&P Global 1200 Communication Services 4.5/22.5/45 Capped IndexTM (the “Underlying Index”), which is designed to measure the performance of global equities in the communication services sector. The Underlying Index is a subset of the S&P Global 1200TM, which is designed to measure the performance of large-capitalization stocks from major global markets, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”).

The Underlying Index uses a capping methodology to limit the weight of the securities of any single issuer (as determined by SPDJI) to a maximum of 25% of the Underlying Index. The capping methodology limits the sum of the weights of the securities of all issuers that individually constitute more than 5%of the weight of the Underlying Index to a maximum of 50% of the weight of the Underlying Index in the aggregate. In order to implement this capping methodology, the Underlying Index constrains at quarterly rebalance: (i) the weight of any single issuer to a maximum of 22.5%, and (ii) the aggregate weight of all issuers that individually exceed 4.5% of the index weight to maximum of 45%. In implementing this capping methodology, SPDJI may consider two or more companies as belonging to the same issuer where there is reasonable evidence of common control.

As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the communication services industry or sector. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries: Australia, Brazil, Canada, China, Finland, France, Germany, Italy, Japan, Mexico, the Netherlands, Norway, Singapore, South Korea, Spain, Sweden, Switzerland, the United Kingdom (the “U.K.”) and the U.S.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the S&P Global 1200 Consumer Discretionary (Sector) Capped IndexTM (the “Underlying Index”), which is designed to measure the performance of global equities in the consumer discretionary sector. The Underlying Index uses a capping methodology. The capping methodology limits the sum of the weights of the securities of all issuers that individually constitute more than 5% of the weight of the Underlying Index to a maximum of 25% of the weight of the Underlying Index in the aggregate. In order to implement this capping methodology, the Underlying Index rebalances quarterly to limit the aggregate weight of all issuers that individually exceed 4.50% of the Underlying Index weight to a maximum of 22.50%. Between scheduled quarterly reviews, the Underlying Index is rebalanced at the end of any day on which issuers that individually constitute more than 5% of the weight of the Underlying Index collectively represent more than 25% of the weight of the Underlying Index in the aggregate. In implementing this capping methodology, S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”)) may consider two or more companies as belonging to the same issuer where there is reasonable evidence of common control. The Underlying Index is a subset of the S&P Global 1200TM, which is designed to measure the performance of large-capitalization stocks from major global markets, as determined by SPDJI. Component companies include consumer product manufacturing, service and retail companies.

As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services industry or sector. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries or regions:

Australia, Canada, Chilé, China, Denmark, France, Germany, Italy, Japan, the Netherlands, South Korea, Spain, Sweden, Switzerland, the United Kingdom (the “U.K.”) and the U.S.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the S&P Global 1200 Consumer Staples (Sector) Capped Index (the “Underlying Index”), which is designed to measure the performance of global equities in the consumer staples sector (as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”)). The Underlying Index uses a capping methodology. The capping methodology limits the sum of the weights of the securities of all issuers that individually constitute more than 5% of the weight of the Underlying Index to a maximum of 25% of the weight of the Underlying Index in the aggregate. In order to implement this capping methodology, the Underlying Index rebalances quarterly to limit the aggregate weight of all issuers that individually exceed 4.50% of the Underlying Index weight to maximum of 22.50%. Between scheduled quarterly index reviews, the Underlying Index is rebalanced at the end of any day on which all issuers that individually constitute more than 5% of the weight of the Underlying Index collectively represent more than 25% of the weight of the Underlying Index in the aggregate. In implementing this capping methodology, SPDJI may consider two or more companies as belonging to the same issuer where there is reasonable evidence of common control. The Underlying Index is a subset of the S&P Global 1200TM, which is designed to measure the performance of large-capitalization stocks from major global markets, as determined by SPDJI.

As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services industry or sector. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries: Australia,

Belgium, Brazil, Canada, Chile, Denmark, Finland, France, Germany, Ireland, Japan, Mexico, the Netherlands, Norway, Portugal, Sweden, Switzerland, the United Kingdom (the “U.K.”) and the U.S.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the S&P Global 1200 Energy 4.5/22.5/45 Capped IndexTM (the “Underlying Index”), which is designed to measure the performance of global equities in the energy sector. The Underlying Index is a subset of the S&P Global 1200, which is designed to measure the performance of large-capitalization stocks from major global markets, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”).

The Underlying Index uses a capping methodology to limit the weight of the securities of any single issuer (as determined by SPDJI) to a maximum of 25% of the Underlying Index. The capping methodology limits the sum of the weights of the securities of all issuers that individually constitute more than 5%of the weight of the Underlying Index to a maximum of 50% of the weight of the Underlying Index in the aggregate. In order to implement this capping methodology, the Underlying Index constrains at quarterly rebalance: (i) the weight of any single issuer to a maximum of 22.5%, and (ii) the aggregate weight of all issuers that individually exceed 4.5% of the index weight to a maximum of 45%. In implementing this capping methodology, SPDJI may consider two or more companies as belonging to the same issuer where there is reasonable evidence of common control.

As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the energy industry or sector. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries: Australia, Austria, Brazil, Canada, China, Colombia, Finland, France, Ireland, Italy, Japan, Norway, Portugal, Spain, the United Kingdom (the “U.K.”) and the U.S.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the S&P Global 1200 Financials (Sector) Capped IndexTM (the “Underlying Index”), which measures the performance of companies that S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”), a subsidiary of S&P Global, Inc., deems to be part of the financials sector of the economy and that SPDJI believes are important to global markets. The Underlying Index is a subset of the S&P Global 1200, which is designed to measure the performance of large-capitalization stocks from major global markets, as determined by SPDJI. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the financials industry or sector. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries or regions: Australia, Austria, Belgium, Brazil, Canada, Chilé, China, Colombia, Denmark, Finland, France, Germany, Hong Kong, Ireland, Italy, Japan, Mexico, the Netherlands, Norway, Peru, Singapore, South Korea, Spain, Sweden, Switzerland, Taiwan, the United Kingdom (the “U.K.”) and the U.S.

The Underlying Index uses a capping methodology. The capping methodology limits the sum of the weights of the securities of all issuers that individually constitute more than 5% of the weight of the Underlying Index to a maximum of 25% of the weight of the Underlying Index in the aggregate. In order to implement this capping methodology, the Underlying Index rebalances quarterly to limit the aggregate weight of all issuers that individually exceed 4.50% of the Underlying Index weight to a maximum of 22.50%. Between scheduled quarterly reviews, the Underlying Index is rebalanced at the end of any day on which issuers that individually constitute more than 5% of the weight of the Underlying Index collectively represent more

than 25% of the weight of the Underlying Index in the aggregate. In implementing this capping methodology SPDJI may consider two or more companies as belonging to the same issuer where there is reasonable evidence of common control.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the S&P Global 1200 Health Care (Sector) Capped IndexTM (the “Underlying Index”), which measures the performance of companies that S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”), a subsidiary of S&P Global, Inc., deems to be a part of the healthcare sector of the economy and that SPDJI believes are important to global markets. The Underlying Index is a subset of the S&P Global 1200, which is designed to measure the performance of large-capitalization stocks from major global markets, as determined by SPDJI. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the healthcare industry or sector. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries: Australia, Belgium, Brazil, China, Denmark, France, Germany, Japan, the Netherlands, South Korea, Spain, Sweden, Switzerland, the United Kingdom (the “U.K.”) and the U.S.

The Underlying Index uses a capping methodology. The capping methodology limits the sum of the weights of the securities of all issuers that individually constitute more than 5% of the weight of the Underlying Index to a maximum of 25% of the weight of the Underlying Index in the aggregate. In order to implement this capping methodology, the Underlying Index rebalances quarterly to limit the aggregate weight of all issuers that individually exceed 4.50% of the Underlying Index weight to a maximum of 22.50%. Between scheduled quarterly reviews, the Underlying Index is rebalanced at the end of any day on which issuers that individually constitute more than 5% of the weight of the Underlying Index collectively represent more than 25% of the weight of the Underlying Index in the aggregate. In implementing this capping methodology SPDJI may consider two or more companies as belonging to the same issuer where there is reasonable evidence of common control.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the S&P Global 1200 Industrials (Sector) Capped IndexTM (the “Underlying Index”), which measures the performance of companies that S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”), a subsidiary of S&P Global, Inc., deems to be part of the industrials sector of the economy and that SPDJI believes are important to global markets. The Underlying Index is a subset of the S&P Global 1200, which is designed to measure the performance of large-capitalization stocks from major global markets, as determined by SPDJI. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the industrials industry or sector. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries or regions: Australia, Brazil, Canada, Chilé, Denmark, Finland, France, Germany, Hong Kong, Ireland, Italy, Japan, Mexico, the Netherlands, Norway, South Korea, Spain, Sweden, Switzerland, the United Kingdom (the “U.K.”) and the U.S.

The Underlying Index uses a capping methodology. The capping methodology limits the sum of the weights of the securities of all issuers that individually constitute more than 5% of the weight of the Underlying Index to a maximum of 25% of the weight of the Underlying Index in the aggregate. In order to implement this capping methodology, the Underlying Index rebalances quarterly to limit the aggregate weight of all issuers that individually exceed 4.50% of the Underlying Index weight to a maximum of 22.50%. Between scheduled quarterly reviews, the Underlying Index is rebalanced at the end of any day on which issuers that individually constitute more than 5% of the weight of the Underlying Index collectively represent more

than 25% of the weight of the Underlying Index in the aggregate. In implementing this capping methodology SPDJI may consider two or more companies as belonging to the same issuer where there is reasonable evidence of common control.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the S&P Global Infrastructure IndexTM (the “Underlying Index”), which is designed to track performance of the stocks of large infrastructure companies in developed or emerging markets (only developed market listings are eligible for stocks of issuers domiciled in emerging markets). The Underlying Index includes companies involved in utilities, energy and transportation infrastructure, such as the management or ownership of oil and gas storage and transportation; airport services; highways and rail tracks; marine ports and services; and electric, gas and water utilities. As of March 31, 2026, the Underlying Index was comprised of securities of companies in the following countries: Australia, Brazil, Canada, China, France, Germany, Italy, Japan, Luxembourg, Mexico, New Zealand, Singapore, Spain, Switzerland, the United Kingdom (the “U.K.”) and the U.S. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the energy, industrials, infrastructure and utilities industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce

exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”), which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the S&P Global 1200 Materials (Sector) Capped IndexTM (the “Underlying Index”), which measures the performance of companies that S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”), a subsidiary of S&P Global, Inc., deems to be part of the materials sector of the economy and that SPDJI believes are important to global markets. The Underlying Index is a subset of the S&P Global 1200, which is designed to measure the performance of large-capitalization stocks from major global markets, as determined by SPDJI. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the materials industry or sector. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries: Australia, Belgium, Brazil, Canada, Chilé, Denmark, Finland, France, Germany, Japan, Luxembourg, Mexico, the Netherlands, Norway, Peru, Sweden, Switzerland, the United Kingdom (the “U.K.”) and the U.S.

The Underlying Index uses a capping methodology. The capping methodology limits the sum of the weights of the securities of all issuers that individually constitute more than 5% of the weight of the Underlying Index to a maximum of 25% of the weight of the Underlying Index in the aggregate. In order to implement this capping methodology, the Underlying Index rebalances quarterly to limit the aggregate weight of all issuers that individually exceed 4.50% of the Underlying Index weight to a maximum of 22.50%. Between scheduled quarterly reviews, the Underlying Index is rebalanced at the end of any day on which issuers that individually constitute more than 5% of the weight of the Underlying Index collectively represent more than 25% of the weight of the Underlying Index in the aggregate. In implementing this capping methodology SPDJI may consider two or more companies as belonging to the same issuer where there is reasonable evidence of common control.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the S&P Global 1200 Information Technology 4.5/22.5/45 Capped IndexTM (the “Underlying Index”), which is designed to measure the performance of global equities in the information technology sector. The Underlying Index is a subset of the S&P Global 1200, which is designed to measure the performance of large-capitalization stocks from major global markets, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”).

The Underlying Index uses a capping methodology to limit the weight of the securities of any single issuer (as determined by SPDJI) to a maximum of 25% of the Underlying Index. The capping methodology limits the sum of the weights of the securities of all issuers that individually constitute more than 5%of the weight of the Underlying Index to a maximum of 50% of the weight of the Underlying Index in the aggregate. In order to implement this capping methodology, the Underlying Index constrains at quarterly rebalance: (i) the weight of any single issuer to a maximum of 22.5%, and (ii) the aggregate weight of all issuers that individually exceed 4.5% of the index weight to a maximum of 45%. In implementing this capping methodology, SPDJI may consider two or more companies as belonging to the same issuer where there is reasonable evidence of common control.

As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the technology industry or sector. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries: Australia, Canada, China, Finland,

France, Germany, Italy, Japan, the Netherlands, New Zealand, South Korea, Sweden, Switzerland, Taiwan, the United Kingdom (the “U.K.”) and the U.S.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the S&P Global Timber & Forestry IndexTM (the “Underlying Index”), which measures the performance of companies engaged in the ownership, management or upstream supply chain of forests and timberlands from both developed and emerging markets. These include forest products companies, timber real estate investment trusts (“REITs”), paper products companies, paper packaging companies and agricultural products companies. Because many securities included in the Underlying Index may be issued by specialized REITs and forest products companies, the Fund is concentrated in the specialized REITs and forest products industries. Companies are eligible for inclusion if they have a minimum total market capitalization of greater than or equal to $300 million, a float adjusted market capitalization (“FMC”) of greater than or equal to $100 million, a median daily value traded of at least $3 million ($2 million for existing constituents) for the six months prior to the rebalancing reference date.

Stocks that meet the above eligibility criteria are reviewed for specific practices related to timber and forestry. Underlying Index constituents are drawn from the S&P Global BMI. The preliminary universe of companies is identified based on any of the following screens:

• Companies that derive at least 25% in aggregate revenue from Timber and Forestry-related businesses as defined by FactSet’s Revere Business Industry Classification System (“RBICS”) data.

• Companies defined as Timber REITs that have a GICS Specialized REITs classification.

• Companies in the universe at the previous rebalancing that were assigned an Exposure Score of at least 0.5 (including companies that were not actually selected for inclusion).

Companies with greater than 75% aggregate revenue from Timber and Forestry-related businesses and all companies from the GICS Timber REITs sub-industry are included in the Underlying Index. If the total number of companies is less than 100, the Index Provider next adds additional constituents in order of revenue exposure to Timber and Forestry-related businesses (the “Exposure Score”) and FMC until the constituent count reaches 100 or until all constituents with an Exposure Score of 0.5 or above are selected. The Underlying Index is weighted based on the product of each constituent's Exposure Score and FMC, subject to certain constraints.

In addition, the Index Provider uses company exclusion criteria related to business activity (e.g., controversial weapons, tobacco, thermal coal, etc.) and other exclusion guidelines based on a company’s compliance with the United Nations Global Compact (“UNGC”) provided by Sustainalytics. Effective with the index review in September 2024, the Index Provider will utilize measurements from S&P Global Business Involvement Screens when monitoring the company exclusion criteria related to business activity (e.g., controversial weapons, tobacco, thermal coal, etc.). Lastly, the Index Provider uses its proprietary controversies model for screening and analysis of controversies related to companies within the Underlying Index. Companies without coverage are ineligible for index inclusion until they receive such coverage.

As of March 31, 2026, the Underlying Index was composed of securities of companies in the following countries: Brazil, Canada, Chilé, China, Finland, Japan, South Africa, Sweden, Thailand, the United Kingdom (the “U.K.”) and the U.S. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the materials, natural resources and timber and forestry-related industries, sub-industries, sectors or sub-sectors. The components of the Underlying Index are likely to change over time.

The Underlying Index is reconstituted semi-annually after the close of the last business day in March and September. The reference date for the reconstitutions is after the close of the last business day of February and August, respectively. In addition, the Underlying Index is reweighted quarterly after the close on the last business day of March, June, September, and December. The pricing reference date used for re-weighting purposes is seven business days prior to the effective date.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”), which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the S&P Global 1200 Utilities (Sector) Capped IndexTM (the “Underlying Index”), which measures the performance of companies that S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”), a subsidiary of S&P Global, Inc., deems to be part of the utilities sector of the economy. The Underlying Index is a subset of the S&P Global 1200, which is designed to measure the performance of large-capitalization stocks from major global markets, as determined by SPDJI. The Underlying Index uses a capping methodology. The capping methodology limits the sum of the weights of the securities of all issuers that individually constitute more than 5% of the weight of the Underlying Index to a maximum of 25% of the weight of the Underlying Index in the aggregate. In order to implement this capping methodology, the Underlying Index constrains at quarterly rebalance the aggregate weight of all issuers that individually exceed 4.5% of the index weight to a maximum of 22.5%. Between scheduled quarterly index reviews, the Underlying Index is rebalanced at the end of any day on which all issuers that individually constitute more than 5% of the weight of the Underlying Index collectively represent more than 25% of the weight of the Underlying Index in the aggregate. In implementing this capping methodology, SPDJI considers two or more companies as belonging to the same issuer where more than 20% of all voting shares in a subsidiary are controlled by the same issuer control group.

As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the utilities industry or sector. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the

Underlying Index was composed of securities of companies in the following countries or regions: Australia, Austria, Brazil, Canada, Chile, Colombia, Denmark, Finland, France, Germany, Italy, Japan, Portugal, Spain, the United Kingdom (the “U.K.”) and the U.S.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Dow Jones U.S. Select Aerospace & Defense Index (the “Underlying Index”), which measures the performance of the aerospace and defense sector of the U.S. equity market, as defined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). Aerospace companies in the Underlying Index include manufacturers, assemblers and distributors of aircraft and aircraft parts. Defense companies in the Underlying Index include producers of components and equipment for the defense industry, such as military aircraft, radar equipment and weapons. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the aerospace and defense and industrials industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including

shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Dow Jones U.S. Select Investment Services Index (the “Underlying Index”), which measures the performance of the investment services sector of the U.S. equity market, as defined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index includes companies providing a range of specialized financial services, including securities brokers and dealers, online brokers, and securities or commodities exchanges. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the financials industry or sector. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such

components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Dow Jones U.S. Select Health Care Providers Index (the “Underlying Index”), which measures the performance of the healthcare providers sector of the U.S. equity market, as defined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index includes companies that are healthcare providers, such as owners and operators of health maintenance organizations, hospitals, clinics, dental and eye care facilities, nursing homes and rehabilitation and retirement centers. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the healthcare industry or sector. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in

the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Dow Jones U.S. Select Home Construction Index (the “Underlying Index”), which measures the performance of the home construction sector of the U.S. equity market, as defined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index includes companies that are constructors of residential homes, including manufacturers of mobile and prefabricated homes; manufacturers and distributors of furniture; retailers and wholesalers concentrating on the sale of home improvement products; and producers of materials used in the construction and refurbishment of buildings and structures. Companies classified as Building Materials & Fixtures, Furnishings, and Home Improvement Retailers must derive a majority of their revenues from residential home construction and remodel-related business activities to be included in the Underlying Index and are, in aggregate, capped at 35% of the Underlying Index. The companies selected for inclusion in the Underlying Index must meet minimum market capitalization requirements, as determined by the Index Provider. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services, home construction and industrials industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental

characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Dow Jones U.S. Select Insurance Index (the “Underlying Index”), which measures the performance of the insurance sector of the U.S. equity market, as defined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the insurance industry or sector. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying

Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Dow Jones U.S. Select Medical Equipment Index (the “Underlying Index”), which measures the performance of the medical equipment sector of the U.S. equity market, as defined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index includes medical equipment companies, including manufacturers and distributors of medical devices such as magnetic resonance imaging (MRI) scanners, prosthetics, pacemakers, X-ray machines, and other nondisposable medical devices. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the healthcare and medical equipment industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including

shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Dow Jones U.S. Select Oil Exploration & Production Index (the “Underlying Index”), which measures the performance of the oil exploration and production sector of the U.S. equity market, as defined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index includes companies that are engaged in the exploration for and drilling, production, refining, and supply of oil and gas products. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the energy industry or sector. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in

the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Dow Jones U.S. Select Oil Equipment & Services Index (the “Underlying Index”), which measures the performance of the oil equipment and services sector of the U.S. equity market, as defined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index includes companies that are suppliers of equipment or services to oil fields and offshore platforms, such as drilling, exploration, seismic information services and platform construction. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the energy industry or sector. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in

the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Dow Jones U.S. Select Pharmaceuticals Index (the “Underlying Index”), which measures the performance of the pharmaceuticals sector of the U.S. equity market, as defined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index includes pharmaceutical companies such as manufacturers of prescription or over-the-counter drugs or vaccines. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the healthcare and pharmaceuticals industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in

the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Dow Jones U.S. Real Estate Capped Index (the “Underlying Index”), which measures the performance of the real estate sector of the U.S. equity market, as defined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index constrains at each quarterly review: (i) the weight of any single issuer (as determined by SPDJI) to a maximum of 10%, and (ii) the aggregate weight of all issuers that individually exceed 4.50% of the index weight to a maximum of 22.50%. Between scheduled quarterly index reviews, the Underlying Index is rebalanced at the end of any day on which all issuers that individually constitute more than 5% of the weight of the Underlying Index constitute more than 25% of the weight of the Underlying Index in the aggregate. In implementing this capping methodology, SPDJI may consider two or more companies as belonging to the same issuer where there is reasonable evidence of common control.

As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the real estate investment trust (“REIT”) industry or sector. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental

characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Dow Jones U.S. Select Regional Banks Index (the “Underlying Index”), which measures the performance of the regional bank sector of the U.S. equity market, as defined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index is a subset of the Dow Jones U.S. Bank Index (the “Parent Index”). Regional banks are selected for inclusion in the Underlying Index based on their relative three-year average total assets as a percentage of the three-year average total assets held by all banks in the Parent Index, as determined by SPDJI. As of March 31, 2026, each bank in the Underlying Index had three-year average total assets that represented less than 5% of the three-year average total assets held by all banks in the Parent Index. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the banking industry or sector. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce

exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the S&P Europe 350TM (the “Underlying Index”), which measures the performance of the securities of leading companies in the following countries: Austria, Belgium, Denmark, Finland, France, Germany, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom (the “U.K.”). The market capitalization of constituent companies is adjusted to reflect the available float and, if necessary, any foreign investment restrictions. The stocks in the Underlying Index are chosen by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”) for market size, liquidity, industry group representation and geographic diversity. The Underlying Index is a subset of the S&P Global 1200, which is designed to measure the performance of large-capitalization stocks from major global markets, as determined by SPDJI. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services, financials and industrials industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce

exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the FTSE Developed ex US ex Korea Small Cap Focused Value Index (the “Underlying Index”), which is provided by FTSE International Limited (the “Index Provider” or “FTSE”). The Underlying Index measures the performance of securities of international developed market small-capitalization companies, excluding the U.S. and Korea, with prominent value factor characteristics, as determined by the Index Provider. The Underlying Index is a subset of the FTSE Developed ex US ex Korea Small Cap Index (the “Parent Index”), which measures the performance of the small-capitalization segment of the international developed equity market, excluding the U.S. and Korea, as defined by the Index Provider.

The construction of the Underlying Index begins with the Parent Index and excludes companies that are ranked in the least liquid 20% based on the 60-day average dollar value traded. The list of eligible constituents is then narrowed to exclude the top 20% of Parent Index constituents with the highest risk based on a 12-month trailing realized volatility. The list is further narrowed to exclude the top 20% of Parent Index constituents with the highest leverage, which is measured by comparing a company’s total debt to its total assets.

Following these three initial screens, the remaining companies are evaluated to exclude companies with a negative sentiment score and negative price momentum. The sentiment score is calculated using the number of upgrades for earnings per share and the number of downgrades for earnings per share for a company's current and next fiscal year. A company with more downgrades for earnings per share than upgrades will have a negative sentiment score. Negative price momentum is determined based on monthly price returns over the trailing 12 months, excluding the latest month.

The remaining companies are then ranked based on a weighted composite score of three value factor metrics: price-to-book, price-to-earnings and price-to-cash flow from operations (the “Composite Score”). The number of securities in the Underlying Index is approximately 25% of the number of securities in the Parent Index. The selected securities are weighted in proportion to their float-adjusted market capitalization with a country constraint of +/- 10% relative to the Parent Index to form a baseline or target composition (the “Target Index”).

The Underlying Index is reviewed monthly and rebalanced to the Target Index if either of the following conditions is met: (i) the Underlying Index’s Composite Score is less than 90% of the Target Index’s Composite Score; or (ii) the Underlying Index has fewer than 20% of the number of securities by count of the Parent Index. If no rebalance is triggered, the component securities of the Underlying Index and their weights will remain unchanged. The Underlying Index may not rebalance for a period of time and is typically composed of 450 - 550 components.

As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services, financials and industrials industries or sectors. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the Underlying Index had 499 components.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by FTSE, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Japan Exchange Group, Inc. and JPX Market Innovation & Research, Inc. (collectively referred to as the “JPX Group”) and Nikkei Inc. (the “Nikkei”) are the Fund’s index providers (collectively, the “Index Provider”). The Fund seeks to track the investment results of the JPX-Nikkei 400 Net Total Return Index (the “Underlying Index”), which is composed of (i) common stocks whose main market is the Tokyo Stock Exchange Prime Market, Standard Market or Growth Market and (ii) securities listed on Tokyo Stock Exchange Prime Market, Standard Market or Growth Market that are not common stocks but are regarded by the Index Provider as equivalent to common stocks, in each case if the inclusion in the Underlying Index is deemed to be “particularly necessary” as determined by the Index Provider.

Companies deemed “particularly necessary” refer to companies that the Index Provider determines to have high appeal for investors and to meet requirements of global investment standards, such as efficient use of capital and investor-focused management perspectives. The Index Provider selects 400 constituents, based on: (i) trading value over the past three years, (ii) market value on the selection base date (the end of June), (iii) scoring by stock by three-year average returns on equity, cumulative operating profit and market value on the selection base date using specified weightings and (iv) qualitative factors tied to corporate governance and disclosure. The currency of the component securities of the Underlying Index is the Japanese yen. The Underlying Index may include large-, mid- and small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and industrials industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Index Provider is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the MSCI USA Quality GARP Select Index (the “Underlying Index”), which was developed by MSCI Inc. (the “Index Provider” or “MSCI”). The Underlying Index is a subset of the MSCI USA Index (the “Parent Index”), which is designed to measure the performance of the large- and mid-capitalization segments of the U.S. equity market, as defined by the Index Provider. The Underlying Index’s “growth at a reasonable price” or “GARP” strategy seeks to measure the performance of securities in the Parent Index that exhibit stronger growth characteristics, with weighting based on relatively favorable value and quality characteristics.

The Index Provider begins by calculating a “growth score” for each security in the Parent Index using five metrics: long-term forward earnings per share (“EPS”) growth rate; short-term forward EPS growth rate; current internal growth rate (based on return on equity and dividend payout metrics); long-term historical EPS growth trend; and long-term historical sales per share growth trend. The Index Provider then selects securities with higher growth scores until approximately 50% of the aggregate market capitalization of the Parent Index is reached, subject to certain constraints.

The process for weighting the selected securities in the Underlying Index involves calculating a “tilt score” for each security. Two components of the tilt score are value and quality scores, which are calculated for each security relative to its peers within the corresponding Global Industry Classification Standards sector. The value score is based on three metrics: price-to-book value, forward price-to-earnings ratio, and the ratio of enterprise value to cash flow from operations. The quality score is based on three metrics: return on equity, debt-to-equity ratio, and earnings variability.

A security’s tilt score is based on the following:

• whether the security is in the top 50% or bottom 50% of the cumulative weight of the selected securities calculated using free float-adjusted market capitalization;

• whether the security’s value score is in the top 50% or bottom 50% of the scores of the selected securities; and

• the particular quartile in which the security’s quality score falls.

Tilt scores are generally lower for securities with larger market capitalizations and higher for securities with more favorable value and quality scores. To determine a security’s weight in the Underlying Index, its tilt score is multiplied by the security’s market capitalization weight in the Parent Index. The maximum weight of any individual issuer is 5%. The Index Provider also applies constraints on turnover and on sector weights after the tilt score is applied, relative to the sector weights of the Underlying Index before the tilt score is applied (i.e., with sector weights based on the free float-adjusted market capitalization of the selected securities). The Underlying Index is rebalanced on a quarterly basis.

As of March 31, 2026, the Underlying Index consisted of 148 component securities. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the technology industry or sector. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by MSCI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Nasdaq-100 ex Top 30 Index (the “Underlying Index”), which measures the performance of approximately 70 securities of domestic and international non-financial companies listed on the Nasdaq Global Select Market or the Nasdaq Global Market and selected based on market capitalization, as determined by Nasdaq, Inc. (the “Index Provider or “Nasdaq”). The Underlying Index is a subset of the Nasdaq-100 Index (the “Parent Index”) and represents securities ranked 31st through 100th in the Parent Index when ranked by market capitalization as determined by Nasdaq. The securities in the Underlying Index are weighted based on the market value of their outstanding shares subject to capping. The Underlying Index is reconstituted and rebalanced quarterly in March, June, September, and December. For capping purposes, at each quarterly rebalance, the weight of any single issuer will not exceed 22.5% of the Underlying Index; and the aggregate weight of issuers with individual weights exceeding 4.5% will not exceed 48% of the Underlying Index. Between rebalances, constituent weights may exceed these constraints due to fluctuations in market value, corporate actions, or other events that change the index composition.

As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and technology industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that

involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of Nasdaq, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Nasdaq-100 Top 30 Index (the “Underlying Index”), which measures the performance of securities of the 30 largest domestic and international non-financial companies listed on the Nasdaq Global Select Market or the Nasdaq Global Market and selected based on market capitalization, as determined by Nasdaq, Inc. (the “Index Provider or “Nasdaq”). The Underlying Index is a subset of the Nasdaq-100 Index (the “Parent Index”). The securities in the Underlying Index are weighted based on the market value of their outstanding shares subject to capping. The Underlying Index is reconstituted and rebalanced quarterly in March, June, September, and December. For capping purposes, at each quarterly rebalance, the weight of any single issuer will not exceed 22.5% of the Underlying Index; and the aggregate weight of issuers with individual weights exceeding 4.5% will not exceed 48% of the Underlying Index. Between rebalances, constituent weights may exceed these constraints due to fluctuations in market value, corporate actions, or other events that change the index composition.

As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and technology industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment

profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of Nasdaq, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Russell Texas Equity Index (the “Underlying Index”), which is designed to measure the performance of equity securities of U.S. companies headquartered in the State of Texas, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a subset of the Russell 3000 Index, which measures the performance of the broad U.S. equity market, as defined by Russell.

To be eligible for the Underlying Index, at each rebalance date, a security must be included in the Russell 3000 Index, have a float-adjusted market capitalization of at least $500 million, and have a three-month daily value traded of at least $3 million. However, an initial public offering that is included in the Russell 3000 Index pursuant to Russell's fast entry rules (“Fast Entry IPO”) is not measured against this daily volume average until it has traded for longer than three months. Eligible securities of companies that are headquartered in the State of Texas, as determined by Russell, are selected for inclusion in the Underlying Index and weighted by float-adjusted market capitalization.

The Underlying Index is reconstituted and rebalanced quarterly, at the close of the fourth Friday in June and the third Friday of March, September and December. A Fast Entry IPO, however, is added to the Underlying Index when it is added to the Russell 3000 Index.

The Underlying Index uses a capping methodology at each quarterly rebalance that limits the (1) weight of any single security to a maximum of 10% of the Underlying Index weight and (2) sum of all companies with a weight above 4.5% to an aggregate of 45% of the Underlying Index weight.

The Underlying Index may include large-, mid- and small- capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and energy industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the S&P 500 Top 20 Select Index (the “Underlying Index”), which measures the performance of the 20 largest U.S. companies by float-adjusted market capitalization within the S&P 500 (the “Parent Index”) as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The securities in the Underlying Index are weighted based on the float-adjusted market value of their outstanding shares subject to capping. At each quarterly rebalance in March, June, September, and December, the weight of any single issuer will not exceed 22.5% of the Underlying Index; and the aggregate weight of issuers with individual weights exceeding 4.5% will not exceed 48% of the Underlying Index. Between rebalances, constituent weights may exceed these constraints due to fluctuations in market value, corporate actions, or other events that change the index composition.

As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the communications and technology industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental

characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Russell 2000 Focused Value Select Index (the “Underlying Index”), which is an equal-weighted equity index provided by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index measures the performance of small-capitalization U.S. companies with prominent value factor characteristics, as determined by the Index Provider. The Underlying Index is a subset of the Russell 2000® Index (the “Parent Index”), which measures the performance of the small-capitalization segment of the U.S. equity market, as defined by the Index Provider.

The construction of the Underlying Index begins with the Parent Index and excludes companies that are ranked in the least liquid 20% (i.e. approximately 391 constituents) based on the 60-day average dollar value traded. The list of eligible constituents is then narrowed to exclude the top 20% of Parent Index constituents with the highest risk based on a 12-month trailing realized volatility. The list is further narrowed to exclude the top 20% of Parent Index constituents with the highest leverage, which is measured by comparing a company’s total debt to its total assets.

Following these three initial screens, the remaining companies are evaluated to exclude companies with a negative sentiment score, which is calculated using the number of upgrades for earnings per share and the number of downgrades for earnings per share for a company's current and next fiscal year. A company with more downgrades for earnings per share than upgrades will have a negative sentiment score.

The remaining companies are then ranked based on a weighted composite score of three value factor metrics: price-to-book, price-to-earnings and price-to-cash flow from operations (the “Composite Score”). The top 250 ranked stocks are selected and equally weighted to form a baseline or target composition (the “Target Index”).

Industry exposure is capped so that the difference between an industry weight in the Target Index and in the Parent Index is less than 5%. The Underlying Index is reviewed monthly and will be rebalanced to the Target Index if there is a greater than 10% difference between an industry weight in the Underlying Index and in the Parent Index. It will also be rebalanced if either of the following conditions are met: (i) the Underlying Index’s Composite Score is less than 90% of the Target Index's Composite Score; or (ii) the Underlying Index has fewer than 200 securities. If no rebalance is triggered, the component securities of the Underlying Index and their weights will remain unchanged. The Underlying Index may contain fewer than 250 stocks and may not rebalance for a period of time.

As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services, financials and industrials industries or sectors. The components of the Underlying Index are likely to change over time. As of March 31, 2026, the Underlying Index had 238 components.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the NYSE Biotechnology Index (the “Underlying Index”), which measures the performance of U.S.-listed securities of companies that are classified according to the ICE Uniform Sector Classification schema within the Biotechnology Sub-Industry Group (as determined by ICE Data Indices, LLC or its affiliates (collectively “Index Provider” or “IDI”)) and that also meet other eligibility criteria determined by the Index Provider, including minimum market capitalization and liquidity requirements. Companies classified within the Biotechnology Sub-Industry Group include those companies that are engaged in the research and development of therapeutic treatments but that are not focused on the commercialization and mass production of pharmaceutical drugs. The Biotechnology Sub-Industry Group also includes those companies that are engaged in the production of tools or systems that enable biotechnology processes. The Underlying Index may include large-, mid- and small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the biotechnology and healthcare industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index.

The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by the Index Provider, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the S&P North American Expanded Technology Sector Index (the “Underlying Index”), which measures the performance of U.S.-traded stocks from the technology sector and select technology-related companies from the communication services and consumer discretionary sectors in the U.S. and Canada, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index includes companies in the following categories: producers of sophisticated computer-related devices; providers of communications equipment and internet services; producers of computer and internet software; consultants for information technology; providers of computer services; semiconductors and semiconductor equipment manufacturers; and a select company engaging in content and information creation or distribution. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the communication services and technology industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental

characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the S&P North American Expanded Technology Software IndexTM (the “Underlying Index”), which measures the performance of U.S.-traded stocks from the software industry and select companies from the interactive home entertainment and interactive media and services sub-industries in the U.S. and Canada, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index includes companies that are producers of client/server applications; enterprise software; application software; home entertainment software; and media and services software. The Underlying Index may include large-, mid- or small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the technology industry or sector. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such

components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the FTSE Nareit All Mortgage Capped Index (the “Underlying Index”), which measures the performance of the residential and commercial mortgage real estate, mortgage finance and savings associations sectors of the U.S. equity market, as defined by FTSE International Limited (the “Index Provider” or “FTSE”). The Underlying Index generally measures the performance of the residential and commercial mortgage real estate sector and generally invests all of its assets in REITs. If the number of constituents in the Underlying Index falls below 20, FTSE will consider companies from the mortgage finance and savings associations sectors for inclusion in the Underlying Index, and each company in the mortgage finance and savings associations sectors will be capped at 3% of the Underlying Index, and these sectors in the aggregate will not exceed 30% of the Underlying Index. As of March 31, 2026, approximately 100% of the market capitalization of the Underlying Index was represented by REITs. As of March 31, 2026, the Underlying Index included 32 component securities. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce

exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by FTSE, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the S&P North American Natural Resources Sector Index (the “Underlying Index”), which measures the performance of U.S.-traded stocks of natural resource-related companies in the U.S. and Canada, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index includes companies that are classified under the GICS® energy and materials sectors, excluding the chemicals industry, and steel sub-industry. The Underlying Index may include large-, mid- and small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the energy, materials and natural resources industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in

the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the ICE Exchange-Listed Preferred & Hybrid Securities Index (the “Underlying Index”), which measures the performance of a select group of exchange-listed, U.S. dollar-denominated preferred securities, hybrid securities and convertible preferred securities listed on the New York Stock Exchange (“NYSE”) or the Nasdaq Capital Market. The Underlying Index includes issuances of preferred stocks with amounts outstanding over $100 million, convertible preferred stock with at least $50 million face amount outstanding, and hybrid securities with at least $250 million face amount outstanding, that meet minimum maturity and other requirements, as applicable, as determined by ICE Data Indices, LLC (the “Index Provider” or “ICE Data”).

In general, preferred stock is a class of equity security that pays a specified dividend that must be paid before any dividends can be paid to common stockholders and takes precedence over common stock in the event of a company’s liquidation. In general, a “hybrid” security refers to a security which combines both debt and equity characteristics. In general, hybrid securities included in the Underlying Index, like traditional preferred stock, have preference over the common stock within an issuer’s capital structure, and are issued and traded in a similar manner to traditional preferred stock. Like debt securities and preferred stock (but unlike common stock), issuers of hybrid securities included in the Underlying Index may make fixed, periodic payments to the holders of such securities. Like preferred stock, issuers of hybrid securities included in the Underlying Index have the ability to defer dividend payments and to extend such securities’ maturity dates.

Although preferred stocks represent a partial ownership interest in a company, preferred stocks generally do not carry voting rights. Preferred stocks have economic characteristics similar to fixed-income securities. Preferred stocks and hybrid securities generally are issued with a fixed par value and pay dividends based on a percentage of that par value at a fixed or variable rate.

Additionally, preferred stocks and hybrid securities often have a liquidation value that generally equals the original purchase price of such security at the date of issuance. The Underlying Index may include many different categories of preferred stock and hybrid securities, such as floating and fixed rate preferreds, fixed-to-floating rate securities, callable preferreds, convertible preferreds, cumulative and non-cumulative preferreds, certain capital securities, trust preferreds or various other preferred stock and hybrid securities. The total allocation to an individual issuer across the entire Underlying Index is limited to 4.75%. The Underlying Index uses a market capitalization weighted methodology subject to certain constraints and is rebalanced monthly.

The Underlying Index may include large-, mid- or small-capitalization companies and includes preferred stocks and hybrid securities of non-U.S. issuers. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the financials industry or sector. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is owned, maintained and administered by the Index Provider, ICE Data, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the FTSE Nareit All Residential Capped Index (the “Underlying Index”), which measures the performance of the residential apartments, manufactured homes, healthcare and self-storage real estate sectors of the U.S. equity market, as defined by FTSE International Limited (the “Index Provider” or “FTSE”). Only companies with a full market capitalization greater than US $100 million (on the date at which the data for the review are taken) will be included in the Underlying Index. As of March 31, 2026, a significant portion of the Underlying Index was represented by real estate investment trusts (“REITs”). The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including

shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by FTSE, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the NYSE Semiconductor Index (the “Underlying Index”), which measures the performance of the equity securities of the 30 largest U.S.-listed companies that are classified according to the ICE Uniform Sector Classification schema within the semiconductors industry (as determined by ICE Data Indices, LLC or its affiliates (collectively “Index Provider” or “IDI”)). Constituents must also meet other eligibility criteria determined by the Index Provider, including minimum market capitalization and liquidity requirements. Companies classified within the semiconductors industry include companies that either manufacture materials that have electrical conductivity (semiconductors) to be used in electronic applications or utilize LED and OLED technology. The semiconductors industry also includes companies that provide services or equipment associated with semiconductors such as packaging and testing. The Underlying Index may include large- and mid-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the semiconductor and technology industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index.

The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by the Index Provider, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the S&P Data Center, Tower REIT and Communications Equipment Index (the “Underlying Index”), which measures the performance of stocks of U.S.-listed companies, as well as U.S.-listed American Depository Receipts of foreign companies from developed markets, involved in the ownership and management of data centers, telecommunication towers, and related equipment, as determined by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”).

The Underlying Index is a subset of the S&P Developed Broad Market Index and includes securities with a minimum float-adjusted market capitalization (“FMC”) of $300 million and a three-month Median Daily Value Traded (“MDTV”) of $2 million. The Underlying Index may include large-, mid- or small-capitalization companies.

The Index Provider selects index constituents using a tiered approach consisting of Tier 1a, Tier 1b, and Tier 2, based on a company’s FactSet Revere Business Industry Classification System (“RBICS”) Focus Level 6 sub-industry, which defines each company’s primary line of business. The Index Provider selects companies which are classified within 17 sub-industries, which correspond with the following categories: Telecommunication Towers, Data Centers, Communications Equipment, Communications Semiconductors, and Data Storage Equipment.

SPDJI classifies Tier 1a and Tier 1b companies as those belonging to the sub-industries of the Telecommunication Towers and Data Centers categories, respectively. The Index Provider classifies Tier 2 companies as those belonging to the sub-industries of the Communications Equipment, Communications Semiconductors and Data Storage Equipment categories. If there are 50 or more stocks classified as Tier 1a and Tier 1b, then all of Tier 1a and Tier 1b stocks are selected for inclusion in the Underlying Index and the Index Provider does not look to Tier 2 companies. If less than 50 stocks are classified as Tier 1a and Tier 1b, the largest eligible Tier 2 stocks, determined by the Index Provider according to the company’s FMC, are selected until the total stocks in the Underlying Index are capped at 50.

The Index Provider requires the Tier 1a companies and Tier 1b companies, in aggregate, to have a minimum of 25% weight for each tier. Tier 2 companies may comprise up to 45% of the overall weight of the Underlying Index. Individual Tier 1a and Tier 1b securities are capped at 10%, and individual and Tier 2 securities are capped at 4.5%. Securities with weights greater than 4.5% will not in aggregate exceed 45% of the Underlying Index weight at rebalance. The Underlying Index is reviewed annually in December and rebalanced quarterly in March, June, and September.

As of March 31, 2026, the Underlying Index had 25 securities and a significant portion of the index constituents were represented by securities of companies in the real estate and technology industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the NYSE® FactSet U.S. Infrastructure Index (the “Underlying Index”), which is designed to measure the performance of equity securities of U.S. companies involved in U.S.-focused infrastructure activities (as determined by ICE Data Indices, LLC or its affiliates (the “Index Provider” or “IDI”)).

The Underlying Index is composed of equity securities primarily listed on the New York Stock Exchange (“NYSE”), NYSE American or Nasdaq (excluding master limited partnerships, royalty trusts, business development companies, and American depositary receipts) that are classified to be under one of the 95 infrastructure-related industries as defined by FactSet Revere Business Industry Classification System (“RBICS”). Each company in the Underlying Index is classified as either Category 1 or Category 2, where Category 1 companies are infrastructure enablers and Category 2 are infrastructure asset owners and operators.

Infrastructure enablers are potential beneficiaries of infrastructure investment in the U.S. Category 1 companies in the Underlying Index include companies in construction and engineering services, machineries, materials, and certain railroad transportation industries. Infrastructure asset owners and operators are companies associated with traditional equity infrastructure investing. Category 2 companies in the Underlying Index include companies in energy transportation and storage, and utilities.

At the time of inclusion, eligible companies must derive 50% or more of their annual revenues from the U.S. The Underlying Index applies a 50% weighting to Category 1 and Category 2. Within each category, constituent weights are determined based on security-level float-adjusted market capitalization, subject to an individual constituent cap of 4%, with any excess weight redistributed among the remaining constituents in their respective category on a pro rata basis.

The Underlying Index is reviewed and reconstituted annually in March. Constituent weights of the Underlying Index are rebalanced quarterly. The Underlying Index may include large-, mid-, and small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the industrials, materials and utilities industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is owned, maintained and administered by the Index Provider, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index. The Underlying Index is compiled utilizing RBICS classifications licensed from FactSet Research Systems, Inc. (“FactSet”). RBICS is an industry classification system defined by FactSet, which has full discretion over the classification system and is not affiliated with the Index Provider, the Fund or BFA. The classification methodology utilized for RBICS combines both market-defined information and a bottom-up approach to classify companies from all economic sectors and industries, including those in the infrastructure industry. RBICS's assignment for companies is reviewed at least once a year, with corporate actions being monitored on an ongoing basis.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the S&P U.S. Manufacturing Select Index (the “Underlying Index”), which was developed by S&P Dow Jones Indices LLC (the “Index Provider” or “SPDJI”). The Underlying Index is designed to measure the performance of equity securities of U.S.-domiciled companies that are involved in manufacturing and manufacturing-related industries and that generate a certain amount of revenues in the U.S., among other eligibility criteria, as determined by SPDJI.

The Underlying Index is a subset of the S&P United States BMI (the “Parent Index”), which includes all U.S.-domiciled companies, as determined SPDJI. All constituents of the Parent Index that meet the following eligibility criteria are included in the Underlying Index. A company must be classified in one of the following FactSet Revere Business Industry Classification System (“RBICS”) categories: Industrial Manufacturing (L2); Consumer Vehicles and Parts (L2); and a subset of the Electronic Components and Manufacturing (L2) category composed of Electronic Components (L3), Electronic Equipment Manufacturing (L3), Manufacturing Equipment and Services (L3), and Semiconductor Manufacturing Capital Equipment (L4). In the RBICS classification, L2 refers to a sector, L3 to a sub-sector, and L4 to an industry group.

Companies in the Industrial Manufacturing and Consumer Vehicles and Parts categories must derive at least 50% of their annual revenues from the U.S. Companies in an Electronic Components and Manufacturing subset must derive at least 25% of their annual revenues from the U.S. In addition, eligible constituents must have a float-adjusted market capitalization of at least $2 billion and a three-month median daily value traded of at least $5 million.

Constituents of the Underlying Index are weighted by float-adjusted market capitalization through an optimization process, with a 4% cap on individual securities. In addition, a 15% cap is applied to the Consumer Vehicles and Parts category, the Electronic Components and Manufacturing subset and each of the following subsets of the Industrial Manufacturing category:

• Aerospace and Defense Manufacturing (L3)

• Electrical Equipment and Power Systems (L3)

• Transportation Equipment Manufacturing (L3)

• Air, Liquid and Gas Control Equipment (L4)

• Factory Automation Equipment (L4)

• Industrial Machine Parts and Support Equipment (L4)

• Natural Resource and Construction Machinery Makers (L4)

• Other Machinery Manufacturing (L4)

• Tools and Outdoor Care Equipment (L4)

The Underlying Index is rebalanced quarterly and reconstituted annually.

The Underlying Index may include large-, mid- and small-capitalization companies. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the industrials, manufacturing and technology industries or sectors.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is a product of SPDJI, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Russell 1000 Telecommunications RIC 22.5/45 Capped Index (the “Underlying Index”), which measures the performance of the telecommunications sector of the U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index will include large- and mid-capitalization companies.

The Underlying Index is a subset of the Russell 1000 Index, which is a float-adjusted capitalization-weighted index of equity securities issued by approximately the 1,000 largest issuers in the Russell 3000 Index. The Russell 3000 Index measures the performance of the broad U.S. equity market, as defined by Russell.

The Underlying Index uses a capping methodology to constrain at quarterly rebalance: (i) the weight of any single issuer (as determined by Russell) to a maximum of 22.5%, and (ii) the aggregate weight of all issuers that individually exceed 4.5% of the index weight to a maximum of 45%. The weight of one or more securities in the Underlying Index may exceed these constraints due to fluctuations in market value, corporate actions, or other events that change the index composition between quarterly rebalance dates.

As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the communications industry or sector. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Russell Microcap Index (the “Underlying Index”), which measures the performance of the microcap sector of the U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a float-adjusted capitalization-weighted index and includes equity securities issued by issuers with total market capitalizations ranging from approximately $1 million to $3.2 billion, although this range may change from time to time. The Underlying Index consists of approximately the 1,000 smallest issuers in the Russell 3000® Index plus the next 1,000 smallest issuers in the equity universe as determined by Russell. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the financials and healthcare industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including

shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Russell 1000® Index (the “Underlying Index”), which measures the performance of the large- and mid-capitalization sectors of the U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a subset of the Russell 3000 Index, which measures the performance of the broad U.S. equity market, as defined by Russell. The Underlying Index is a float-adjusted capitalization-weighted index of equity securities issued by the approximately 1,006 largest issuers in the Russell 3000 Index. As of March 31, 2026, the Underlying Index represented approximately 95% of the total market capitalization of the Russell 3000 Index. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and technology industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including

shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Diversification Policy. The Fund intends to be diversified in approximately the same proportion as the Underlying Index is diversified and to invest all or substantially all of its assets in components of the Underlying Index in approximately the same proportion as each component’s weighting in the Underlying Index. This diversification policy may limit the Fund’s ability to use representative sampling. The Fund may become “non-diversified,” as defined in the 1940 Act, solely as a result of a change in relative market capitalization or index weighting of one or more components of the Underlying Index. Shareholder approval will not be sought if the Fund becomes “non-diversified” due solely to a change in the relative market capitalization or index weighting of one or more components of the Underlying Index. The Fund discloses its portfolio holdings and weightings at www.iShares.com.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Russell 1000® Growth Index (the “Underlying Index”), which measures the performance of large- and mid-capitalization growth sectors of the U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a subset of the Russell 1000® Index, which measures the performance of the large- and mid-capitalization sector of the U.S. equity market, as defined by Russell. As of March 31, 2026, the Underlying Index represented approximately 66% of the total market value of the Russell 1000 Index. The Underlying Index measures the performance of equity securities of Russell 1000 Index issuers with higher price-to-book ratios, higher forecasted medium-term growth and higher sales-per-share historical growth relative to all issuers whose securities are included in the Russell 1000 Index.

The Underlying Index is rebalanced quarterly after the close of business on the third Friday of March, June, September, and December. At each quarterly rebalance, the weight of any single company is capped at 22.5% of the index weight and the weight of all companies exceeding 4.5% weight of the index individually are capped at 45% of the index weight in aggregate.

As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services and technology industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Diversification Policy. The Fund intends to be diversified in approximately the same proportion as the Underlying Index is diversified and to invest all or substantially all of its assets in components of the Underlying Index in approximately the same proportion as each component’s weighting in the Underlying Index. This diversification policy may limit the Fund’s ability to use representative sampling. The Fund may become “non-diversified,” as defined in the 1940 Act, solely as a result of a change in relative market capitalization or index weighting of one or more components of the Underlying Index. Shareholder approval will not be sought if the Fund becomes “non-diversified” due solely to a change in the relative market capitalization or index weighting of one or more components of the Underlying Index. The Fund discloses its portfolio holdings and weightings at www.iShares.com.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Russell 1000® Value Index (the “Underlying Index”), which measures the performance of large- and mid-capitalization value sectors of the U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a subset of the Russell 1000® Index, which measures the performance of the large- and mid-capitalization sector of the U.S. equity market, as defined by Russell. As of March 31, 2026, the Underlying Index represented approximately 66% of the total market value of the Russell 1000 Index. The Underlying Index measures the performance of equity securities of Russell 1000 Index issuers with lower price-to-book ratios, lower sales-per-share historical growth and lower forecasted growth relative to all issuers whose securities are included in the Russell 1000 Index.

The Underlying Index is rebalanced quarterly after the close of business on the third Friday of March, June, September, and December. At each quarterly rebalance, the weight of any single company is capped at 22.5% of the index weight and the weight of all companies exceeding 4.5% weight of the index individually are capped at 45% of the index weight in aggregate.

As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services, financials and industrials industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Russell 2000® Index (the “Underlying Index”), which measures the performance of the small-capitalization sector of the U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a subset of the Russell 3000 Index, which measures the performance of the broad U.S. equity market, as defined by Russell. The Underlying Index is a float-adjusted capitalization-weighted index of equity securities issued by the approximately 1,933 smallest issuers in the Russell 3000 Index. As of March 31, 2026, the Underlying Index represented approximately 5% of the total market capitalization of the Russell 3000 Index. As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the financials, healthcare and industrials industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including

shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Russell 2000 Growth Index (the “Underlying Index”), which measures the performance of the small-capitalization growth sector of the U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a subset of the Russell 2000® Index, which measures the performance of the small-capitalization sector of the U.S. equity market, as defined by Russell. As of March 31, 2026, the Underlying Index represented approximately 66% of the total market value of the Russell 2000 Index. The Underlying Index measures the performance of equity securities of Russell 2000 Index issuers with higher price-to-book ratios, higher sales-per-share historical growth and higher forecasted growth relative to all issuers included in the Russell 2000 Index.

The Underlying Index is rebalanced quarterly after the close of business on the third Friday of March, June, September, and December. At each quarterly rebalance, the weight of any single company is capped at 22.5% of the index weight and the weight of all companies exceeding 4.5% weight of the index individually are capped at 45% of the index weight in aggregate.

As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the healthcare, industrials and technology industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Strategy Portfolio Concentration [Text]

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Prospectus [Line Items]

Strategy Narrative [Text Block]

The Fund seeks to track the investment results of the Russell Midcap Growth Index (the “Underlying Index”), which measures the performance of the mid-capitalization growth sector of the U.S. equity market, as defined by FTSE Russell (the “Index Provider” or “Russell”). The Underlying Index is a subset of the Russell Midcap® Index, which measures the performance of the mid-capitalization sector of the U.S. equity market, as defined by Russell. As of March 31, 2026, the Underlying Index represented approximately 41% of the total market value of the Russell Midcap Index. The Underlying Index measures the performance of equity securities of Russell Midcap Index issuers with higher price-to-book ratios, higher sales-per-share historical growth and higher forecasted growth relative to all securities included in the Russell Midcap Index.

The Underlying Index is rebalanced quarterly after the close of business on the third Friday of March, June, September, and December. At each quarterly rebalance, the weight of any single company is capped at 22.5% of the index weight and the weight of all companies exceeding 4.5% weight of the index individually are capped at 45% of the index weight in aggregate.

As of March 31, 2026, a significant portion of the Underlying Index was represented by securities of companies in the consumer goods and services, industrials and technology industries or sectors. The components of the Underlying Index are likely to change over time.

The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund. BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index. The instruments selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the components of the Underlying Index. The Fund may use derivatives to gain or reduce exposure to the components of the Underlying Index or exposure to one or more market risk factors associated with such components. Subject to the limits described herein, the Fund may purchase and hold cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, and may also purchase and hold instruments not included in the Underlying Index when BFA believes that such instruments will help the Fund track the performance of the Underlying Index over time, including in light of expected liquidity or trading costs, anticipated additions to or deletions from the Underlying Index, or other reasons as determined by BFA.

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of any collateral received).

The Underlying Index is sponsored by Russell, which is part of the London Stock Exchange Group and is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the components of the Underlying Index and publishes information regarding the market value of the Underlying Index.

Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities) and repurchase agreements collateralized by U.S. government securities are not considered to be issued by members of any industry.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.

Strategy [Heading]

Principal Investment Strategies

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

In accordance with Rule 35d-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), under normal circumstances, the Fund will not invest less than 80% of the value of its net assets, plus the amount of any borrowings for investment purposes, in components of its Underlying Index. Investments in derivatives and other investments will be counted toward the Fund’s 80% investment policy to the extent that they provide exposure to the components of its Underlying Index or exposure to one or more market risk factors associated with such components. The Fund’s 80% investment policy may be changed by the Trust’s Board of Trustees (the “Board”) upon 60 days’ notice to shareholders.