Prospectus: Risk/Return: Legal Entity Identifier Entity Inv Company Type Document Type Document Period End Date Registrant Name Entity Central Index Key Amendment Flag Amendment Description Trading Symbol Document Creation Date Document Effective Date Prospectus Date Performance Measure [Axis] Share Class [Axis] Document [Axis] Prospectus Coregistrant [Axis] Coregistrant [Domain] Series [Axis] Series S000076777 [Member] iShares 20+ Year Treasury Bond BuyWrite Strategy ETF iShares 20+ Year Treasury Bond BuyWrite Strategy ETF Member Return After Taxes on Distributions After Taxes on Distributions Return After Taxes on Distributions and Sale of Fund Shares After Taxes on Distributions and Sales Before Taxes ICE BofA US Broad Market Index ICE BofA US Broad Market Index [Member] ICE BofA US Broad Market Index (Returns do not reflect deductions for fees, expenses or taxes) Cboe TLT 2 OTM BuyWrite Index Cboe TLT 2 OTM BuyWrite Index [Member] Cboe TLT 2% OTM BuyWrite Index (Returns do not reflect deductions for fees, expenses or taxes) Share Classes C000236812 [Member] iShares 20+ Year Treasury Bond BuyWrite Strategy ETF iShares 20+ Year Treasury Bond BuyWrite Strategy ETF Risk [Axis] All Risks [Member] Risk Nondiversified Status [Member] Risk Lose Money [Member] Risk Money Market Fund Price Fluctuates [Member] Risk Money Market Fund May Impose Fees or Suspend Sales [Member] Risk Money Market Fund May Not Preserve Dollar [Member] Risk Money Market Fund Sponsor May Not Provide Support [Member] Risk Not Insured Depository Institution [Member] Risk Not Insured [Member] Covered Call Option Risk Covered Call Option Risk [Member] U S Treasury Obligations Risk U S Treasury Obligations Risk [Member] Interest Rate Risks Interest Rate Risks [Member] Market Risk Market Risk [Member] Index Related Risk Index Related Risk [Member] Asset Class Risk Asset Class Risk [Member] Authorized Participant Concentration Risk Authorized Participant Concentration Risk [Member] Concentration Risk Concentration Risk [Member] Cybersecurity Risk Cybersecurity Risk [Member] Derivatives Risks Derivatives Risks [Member] Distribution Tax Risk Distribution Tax Risk [Member] Income Risk Income Risk [Member] Investment in Underlying Fund Risk Investment in Underlying Fund Risk [Member] Issuer Risk Issuer Risk [Member] Large Shareholder and Large Scale Redemption Risk Large Shareholder and Large Scale Redemption Risk [Member] Management Risk Management Risk [Member] Market Trading Risk Market Trading Risk [Member] Operational Risk Operational Risk [Member] Risk of Investing in the U S Risk of Investing in the U S [Member] Tax Risk Tax Risk [Member] Tracking Error Risk Tracking Error Risk [Member] Management Fees Management Fees (as a percentage of Assets) Distribution and Service (12b-1) Fees Distribution and Service (12b-1) Fees Other Expenses Other Expenses (as a percentage of Assets): Acquired Fund Fees and Expenses Acquired Fund Fees and Expenses Total Annual Fund Operating Expenses Expenses (as a percentage of Assets) 1 Year Expense Example, with Redemption, 1 Year 1 Year 3 Years Expense Example, with Redemption, 3 Years 3 Years 5 Years Expense Example, with Redemption, 5 Years 5 Years 10 Years Expense Example, with Redemption, 10 Years 10 Years 2023 Annual Return 2023 2024 Annual Return 2024 One Year 1 Year Since Fund Inception Since Inception Inception Date Inception Date Risk/Return [Heading] Objective [Heading] Objective, Primary [Text Block] Objective, Secondary [Text Block] Expense [Heading] Expense Narrative [Text Block] Shareholder Fees Caption [Text] Shareholder Fees Column [Text] Maximum Cumulative Sales Charge (as a percentage of Offering Price) Maximum Cumulative Sales Charge (as a percentage) Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) Maximum Deferred Sales Charge (as a percentage of Offering Price) Maximum Deferred Sales Charge (as a percentage) Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) Redemption Fee (as a percentage of Amount Redeemed) Redemption Fee (as a percentage of Amount Redeemed) Redemption Fee Redemption Fee Exchange Fee (as a percentage of Amount Redeemed) Exchange Fee Maximum Account Fee (as a percentage of Assets) Maximum Account Fee Shareholder Fee, Other Operating Expenses Caption [Text] Operating Expenses Column [Text] Distribution or Similar (Non 12b-1) Fees Component1 Other Expenses Component2 Other Expenses Component3 Other Expenses Fee Waiver or Reimbursement Fee Waiver or Reimbursement Fee Waiver and/or Expense Reimbursement Fee Waiver Net Expenses Net Expenses (as a percentage of Assets) Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement Total Annual Fund Operating Expenses After Fee Waiver Fee Waiver or Reimbursement over Assets, Date of Termination Portfolio Turnover [Heading] Portfolio Turnover [Text Block] Portfolio Turnover, Rate Expense Footnotes [Text Block] Expenses Deferred Charges [Text Block] Expenses Range of Exchange Fees [Text Block] Expense Breakpoint Discounts [Text] Expense Breakpoint, Minimum Investment Required [Amount] Expenses Represent Both Master and Feeder [Text] Expenses Explanation of Nonrecurring Account Fee [Text] Other Expenses, New Fund, Based on Estimates [Text] Acquired Fund Fees and Expenses, Based on Estimates [Text] Expenses Other Expenses Had Extraordinary Expenses Been Included [Text] Expenses Restated to Reflect Current [Text] Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] Expense Example [Heading] Expense Example by Year [Heading] Expense Example Narrative [Text Block] Expense Example by, Year, Caption [Text] Expense Example, No Redemption Narrative [Text Block] Expense Example, No Redemption, By Year, Caption [Text] 1 Year Expense Example, No Redemption, 1 Year 3 Years Expense Example, No Redemption, 3 Years 5 Years Expense Example, No Redemption, 5 Years 10 Years Expense Example, No Redemption, 10 Years Expense Example Footnotes [Text Block] Expense Example Closing [Text Block] Strategy [Heading] Strategy Narrative [Text Block] Strategy Portfolio Concentration [Text] Risk [Heading] Risk [Text Block] Risk Footnotes [Text Block] Risk Closing [Text Block] Risk Caption Risk Column [Text] Bar Chart and Performance Table [Heading] Performance Narrative [Text Block] Performance Information Illustrates Variability of Returns [Text] Performance One Year or Less [Text] Performance Additional Market Index [Text] Performance Availability Phone [Text] Performance Availability Website Address [Text] Performance Past Does Not Indicate Future [Text] Bar Chart [Heading] Bar Chart Narrative [Text Block] Bar Chart Does Not Reflect Sales Loads [Text] Annual Return Caption [Text] Caption Annual Return, Column [Text] Column Annual Return, Inception Date Inception Date Annual Return 1990 Annual Return 1991 Annual Return 1992 Annual Return 1993 Annual Return 1994 Annual Return 1995 Annual Return 1996 Annual Return 1997 Annual Return 1998 Annual Return 1999 Annual Return 2000 Annual Return 2001 Annual Return 2002 Annual Return 2003 Annual Return 2004 Annual Return 2005 Annual Return 2006 Annual Return 2007 Annual Return 2008 Annual Return 2009 Annual Return 2010 Annual Return 2011 Annual Return 2012 Annual Return 2013 Annual Return 2014 Annual Return 2015 2015 Annual Return 2016 2016 Annual Return 2017 2017 Annual Return 2018 2018 Annual Return 2019 2019 Annual Return 2020 2020 Annual Return 2021 2021 Annual Return 2022 2022 Annual Return 2025 Bar Chart Footnotes [Text Block] Bar Chart Closing [Text Block] Bar Chart, Reason Selected Class Different from Immediately Preceding Period [Text] Bar Chart, Returns for Class Not Offered in Prospectus [Text] Year to Date Return, Label Bar Chart, Year to Date Return, Date Bar Chart, Year to Date Return Highest Quarterly Return, Label Label Highest Quarterly Return, Date Highest Quarterly Return Label Lowest Quarterly Return, Label Lowest Quarterly Return, Date Lowest Quarterly Return Performance Table Heading Performance Table Does Reflect Sales Loads Performance Table Market Index Changed Index No Deduction for Fees, Expenses, Taxes [Text] Performance Table Uses Highest Federal Rate Performance Table Not Relevant to Tax Deferred Performance Table One Class of after Tax Shown [Text] Performance Table Explanation after Tax Higher Performance Table Narrative Performance Table Footnotes, Reason Performance Information for Class Different from Immediately Preceding Period [Text] Performance Table Footnotes Performance Table Closing [Text Block] Average Annual Return, Caption Average Annual Return, Column Name Label 5 Years Five years Five Years 10 Years Ten Years Money Market Seven Day Yield, Caption [Text] Money Market Seven Day Yield Column [Text] Money Market Seven Day Yield Phone Money Market Seven Day Yield Money Market Seven Day Tax Equivalent Yield Thirty Day Yield Caption Thirty Day Yield Column [Text] Thirty Day Yield Phone Thirty Day Yield Thirty Day Tax Equivalent Yield Supplement to Prospectus [Text Block] S000076779 [Member] iShares High Yield Corporate Bond BuyWrite Strategy ETF iShares High Yield Corporate Bond BuyWrite Strategy ETF Member Bloomberg U S Universal Index Bloomberg U S Universal Index [Member] Bloomberg U.S. Universal Index (Returns do not reflect deductions for fees, expenses or taxes) Cboe HYG BuyWrite Index Cboe HYG BuyWrite Index [Member] Cboe HYG BuyWrite Index (Returns do not reflect deductions for fees, expenses or taxes) C000236814 [Member] iShares High Yield Corporate Bond BuyWrite Strategy ETF iShares High Yield Corporate Bond BuyWrite Strategy ETF High Yield Securities Risk High Yield Securities Risk [Member] Credit Risks Credit Risks [Member] Assets Under Management AUM Risk Assets Under Management AUM Risk [Member] Call Risk Call Risk [Member] Consumer Goods and Services Companies Risk Consumer Goods and Services Companies Risk [Member] Currency Risk Currency Risk [Member] National Closed Market Trading Risk National Closed Market Trading Risk [Member] Non U S Securities Risk Non U S Securities Risk [Member] Privately Issued Securities Risk Privately Issued Securities Risk [Member] Risk of Investing in Developed Countries Risk of Investing in Developed Countries [Member] Valuation Risk Valuation Risk [Member] S000076781 [Member] iShares Investment Grade Corporate Bond BuyWrite Strategy ETF iShares Investment Grade Corporate Bond BuyWrite Strategy ETF Member Cboe LQD BuyWrite Index Cboe LQD BuyWrite Index [Member] Cboe LQD BuyWrite Index (Returns do not reflect deductions for fees, expenses or taxes) C000236816 [Member] iShares Investment Grade Corporate Bond BuyWrite Strategy ETF iShares Investment Grade Corporate Bond BuyWrite Strategy ETF Financial Companies Risk Financial Companies Risk [Member] Reliance on Trading Partners Risk Reliance on Trading Partners Risk [Member] S000083814 [Member] iShares Russell 2000 BuyWrite ETF iShares Russell 2000 BuyWrite ETF Member C000247831 [Member] iShares Russell 2000 BuyWrite ETF iShares Russell 2000 BuyWrite ETF Small Capitalization Companies Risk Small Capitalization Companies Risk [Member] Equity Securities Risk Equity Securities Risk [Member] Healthcare Companies Risk Healthcare Companies Risk [Member] Industrial Companies Risk Industrial Companies Risk [Member] Small Fund Risk Small Fund Risk [Member] S000083815 [Member] iShares S&P 500 BuyWrite ETF iShares S&P 500 BuyWrite ETF iShares S&P 500 BuyWrite ETF Member C000247832 [Member] iShares S&P 500 BuyWrite ETF iShares S&P 500 BuyWrite ETF Large Capitalization Companies Risk Large Capitalization Companies Risk [Member] Technology Companies Risk Technology Companies Risk [Member] S000044409 [Member] iShares Yield Optimized Bond ETF iShares Yield Optimized Bond ETF Member Morningstar U S Bond Market Yield Optimized Index Morningstar U S Bond Market Yield Optimized Index [Member] Morningstar U.S. Bond Market Yield-Optimized Index (Returns do not reflect deductions for fees, expenses or taxes) C000138243 [Member] iShares Yield Optimized Bond ETF iShares Yield Optimized Bond ETF Affiliated Fund Risk Affiliated Fund Risk [Member] Allocation Risk Allocation Risk [Member] Extension Risk Extension Risk [Member] Illiquid Investments Risk Illiquid Investments Risk [Member] Reinvestment Risk Reinvestment Risk [Member] Risk of Investing in China Risk of Investing in China [Member] Risk of Investing in the China Bond Market Risk of Investing in the China Bond Market [Member] Risk of Investing in Saudi Arabia Risk of Investing in Saudi Arabia [Member] Securities Lending Risk Securities Lending Risk [Member] Sovereign and Quasi Sovereign Obligations Risk Sovereign and Quasi Sovereign Obligations Risk [Member] S000065345 [Member] iShares iBonds 2025 Term High Yield and Income ETF iShares iBonds 2025 Term High Yield and Income ETF Member Bloomberg 2025 Term High Yield and Income Index Bloomberg 2025 Term High Yield and Income Index [Member] Bloomberg 2025 Term High Yield and Income Index (Returns do not reflect deductions for fees, expenses or taxes) C000211404 [Member] iShares iBonds 2025 Term High Yield and Income ETF iShares iBonds 2025 Term High Yield and Income ETF Cash Management Risk Cash Management Risk [Member] Declining Yield Risk Declining Yield Risk [Member] Fluctuation of Yield and Liquidation Amount Risk Fluctuation of Yield and Liquidation Amount Risk [Member] ExpenseExampleMaturity ExpenseExampleMaturity Maturity S000069852 [Member] iShares iBonds 2026 Term High Yield and Income ETF iShares iBonds 2026 Term High Yield and Income ETF Member Bloomberg 2026 Term High Yield and Income Index Bloomberg 2026 Term High Yield and Income Index [Member] Bloomberg 2026 Term High Yield and Income Index (Returns do not reflect deductions for fees, expenses or taxes) C000222633 [Member] iShares iBonds 2026 Term High Yield and Income ETF iShares iBonds 2026 Term High Yield and Income ETF S000072335 [Member] iShares iBonds 2027 Term High Yield and Income ETF iShares iBonds 2027 Term High Yield and Income ETF Member Bloomberg 2027 Term High Yield and Income Index Bloomberg 2027 Term High Yield and Income Index [Member] Bloomberg 2027 Term High Yield and Income Index (Returns do not reflect deductions for fees, expenses or taxes) C000228465 [Member] iShares iBonds 2027 Term High Yield and Income ETF iShares iBonds 2027 Term High Yield and Income ETF Communication Services Sector Risk Communication Services Sector Risk [Member] S000075472 [Member] iShares iBonds 2028 Term High Yield and Income ETF iShares iBonds 2028 Term High Yield and Income ETF Member Bloomberg 2028 Term High Yield and Income Index Bloomberg 2028 Term High Yield and Income Index [Member] Bloomberg 2028 Term High Yield and Income Index (Returns do not reflect deductions for fees, expenses or taxes) C000234589 [Member] iShares iBonds 2028 Term High Yield and Income ETF iShares iBonds 2028 Term High Yield and Income ETF S000075473 [Member] iShares iBonds 2029 Term High Yield and Income ETF iShares iBonds 2029 Term High Yield and Income ETF Member Bloomberg 2029 Term High Yield and Income Index Bloomberg 2029 Term High Yield and Income Index [Member] Bloomberg 2029 Term High Yield and Income Index (Returns do not reflect deductions for fees, expenses or taxes) C000234590 [Member] iShares iBonds 2029 Term High Yield and Income ETF iShares iBonds 2029 Term High Yield and Income ETF S000080642 [Member] iShares iBonds 2030 Term High Yield and Income ETF iShares iBonds 2030 Term High Yield and Income ETF Member Bloomberg 2030 Term High Yield and Income Index Bloomberg 2030 Term High Yield and Income Index [Member] Bloomberg 2030 Term High Yield and Income Index (Returns do not reflect deductions for fees, expenses or taxes) C000243158 [Member] iShares iBonds 2030 Term High Yield and Income ETF iShares iBonds 2030 Term High Yield and Income ETF S000085094 [Member] iShares iBonds 2031 Term High Yield and Income ETF iShares iBonds 2031 Term High Yield and Income ETF Member C000249959 [Member] iShares iBonds 2031 Term High Yield and Income ETF iShares iBonds 2031 Term High Yield and Income ETF S000048153 [Member] iShares iBonds Dec 2025 Term Corporate ETF iShares iBonds Dec 2025 Term Corporate ETF Member Bloomberg December 2025 Maturity Corporate Index Bloomberg December 2025 Maturity Corporate Index [Member] Bloomberg December 2025 Maturity Corporate Index (Returns do not reflect deductions for fees, expenses or taxes) C000152180 [Member] iShares iBonds Dec 2025 Term Corporate ETF iShares iBonds Dec 2025 Term Corporate ETF S000055059 [Member] iShares iBonds Dec 2026 Term Corporate ETF iShares iBonds Dec 2026 Term Corporate ETF Member Bloomberg December 2026 Maturity Corporate Index Bloomberg December 2026 Maturity Corporate Index [Member] Bloomberg December 2026 Maturity Corporate Index (Returns do not reflect deductions for fees, expenses or taxes) C000173141 [Member] iShares iBonds Dec 2026 Term Corporate ETF iShares iBonds Dec 2026 Term Corporate ETF S000058301 [Member] iShares iBonds Dec 2027 Term Corporate ETF iShares iBonds Dec 2027 Term Corporate ETF Member Bloomberg December 2027 Maturity Corporate Index Bloomberg December 2027 Maturity Corporate Index [Member] Bloomberg December 2027 Maturity Corporate Index (Returns do not reflect deductions for fees, expenses or taxes) C000191091 [Member] iShares iBonds Dec 2027 Term Corporate ETF iShares iBonds Dec 2027 Term Corporate ETF S000063041 [Member] iShares iBonds Dec 2028 Term Corporate ETF iShares iBonds Dec 2028 Term Corporate ETF Member Bloomberg December 2028 Maturity Corporate Index Bloomberg December 2028 Maturity Corporate Index [Member] Bloomberg December 2028 Maturity Corporate Index (Returns do not reflect deductions for fees, expenses or taxes) C000204503 [Member] iShares iBonds Dec 2028 Term Corporate ETF iShares iBonds Dec 2028 Term Corporate ETF S000066401 [Member] iShares iBonds Dec 2029 Term Corporate ETF iShares iBonds Dec 2029 Term Corporate ETF Member Bloomberg December 2029 Maturity Corporate Index Bloomberg December 2029 Maturity Corporate Index [Member] Bloomberg December 2029 Maturity Corporate Index (Returns do not reflect deductions for fees, expenses or taxes) C000214263 [Member] iShares iBonds Dec 2029 Term Corporate ETF iShares iBonds Dec 2029 Term Corporate ETF S000068777 [Member] iShares iBonds Dec 2030 Term Corporate ETF iShares iBonds Dec 2030 Term Corporate ETF Member Bloomberg December 2030 Maturity Corporate Index Bloomberg December 2030 Maturity Corporate Index [Member] Bloomberg December 2030 Maturity Corporate Index (Returns do not reflect deductions for fees, expenses or taxes) C000219751 [Member] iShares iBonds Dec 2030 Term Corporate ETF iShares iBonds Dec 2030 Term Corporate ETF S000072204 [Member] iShares iBonds Dec 2031 Term Corporate ETF iShares iBonds Dec 2031 Term Corporate ETF Member Bloomberg December 2031 Maturity Corporate Index Bloomberg December 2031 Maturity Corporate Index [Member] Bloomberg December 2031 Maturity Corporate Index (Returns do not reflect deductions for fees, expenses or taxes) C000228040 [Member] iShares iBonds Dec 2031 Term Corporate ETF iShares iBonds Dec 2031 Term Corporate ETF S000076685 [Member] iShares iBonds Dec 2032 Term Corporate ETF iShares iBonds Dec 2032 Term Corporate ETF Member Bloomberg December 2032 Maturity Corporate Index Bloomberg December 2032 Maturity Corporate Index [Member] Bloomberg December 2032 Maturity Corporate Index (Returns do not reflect deductions for fees, expenses or taxes) C000236700 [Member] iShares iBonds Dec 2032 Term Corporate ETF iShares iBonds Dec 2032 Term Corporate ETF S000080643 [Member] iShares iBonds Dec 2033 Term Corporate ETF iShares iBonds Dec 2033 Term Corporate ETF Member Bloomberg December 2033 Maturity Corporate Index Bloomberg December 2033 Maturity Corporate Index [Member] Bloomberg December 2033 Maturity Corporate Index (Returns do not reflect deductions for fees, expenses or taxes) C000243159 [Member] iShares iBonds Dec 2033 Term Corporate ETF iShares iBonds Dec 2033 Term Corporate ETF S000085096 [Member] iShares iBonds Dec 2034 Term Corporate ETF iShares iBonds Dec 2034 Term Corporate ETF Member C000249961 [Member] iShares iBonds Dec 2034 Term Corporate ETF iShares iBonds Dec 2034 Term Corporate ETF S000088577 [Member] iShares iBonds 1-5 Year Corporate Ladder ETF iShares iBonds 1-5 Year Corporate Ladder ETF Member C000254885 [Member] iShares iBonds 1-5 Year Corporate Ladder ETF iShares iBonds 1-5 Year Corporate Ladder ETF S000088578 [Member] iShares iBonds 1-5 Year High Yield and Income Ladder ETF iShares iBonds 1-5 Year High Yield and Income Ladder ETF Member C000254886 [Member] iShares iBonds 1-5 Year High Yield and Income Ladder ETF iShares iBonds 1-5 Year High Yield and Income Ladder ETF S000088579 [Member] iShares iBonds 1-5 Year TIPS Ladder ETF iShares iBonds 1-5 Year TIPS Ladder ETF Member C000254887 [Member] iShares iBonds 1-5 Year TIPS Ladder ETF iShares iBonds 1-5 Year TIPS Ladder ETF Inflation Indexed Bonds Risk Inflation Indexed Bonds Risk [Member] S000088580 [Member] iShares iBonds 1-5 Year Treasury Ladder ETF iShares iBonds 1-5 Year Treasury Ladder ETF Member C000254888 [Member] iShares iBonds 1-5 Year Treasury Ladder ETF iShares iBonds 1-5 Year Treasury Ladder ETF S000042353 [Member] iShares 0-5 Year High Yield Corporate Bond ETF iShares 0-5 Year High Yield Corporate Bond ETF Member Markit iBoxx USD Liquid High Yield 0 5 Index Markit iBoxx USD Liquid High Yield 0 5 Index [Member] Markit iBoxx USD Liquid High Yield 0-5 Index (Returns do not reflect deductions for fees, expenses or taxes) C000131291 [Member] iShares 0-5 Year High Yield Corporate Bond ETF iShares 0-5 Year High Yield Corporate Bond ETF S000042354 [Member] iShares 0-5 Year Investment Grade Corporate Bond ETF iShares 0-5 Year Investment Grade Corporate Bond ETF Member Markit iBoxx USD Liquid Investment Grade 0 5 Index Markit iBoxx USD Liquid Investment Grade 0 5 Index [Member] Markit iBoxx USD Liquid Investment Grade 0-5 Index (Returns do not reflect deductions for fees, expenses or taxes) C000131292 [Member] iShares 0-5 Year Investment Grade Corporate Bond ETF iShares 0-5 Year Investment Grade Corporate Bond ETF S000035916 [Member] iShares Aaa - A Rated Corporate Bond ETF iShares Aaa - A Rated Corporate Bond ETF Member Bloomberg U S Corporate Aaa A Capped Index Bloomberg U S Corporate Aaa A Capped Index [Member] Bloomberg U.S. Corporate Aaa - A Capped Index (Returns do not reflect deductions for fees, expenses or taxes) C000110081 [Member] iShares Aaa - A Rated Corporate Bond ETF iShares Aaa - A Rated Corporate Bond ETF S000063139 [Member] iShares BB Rated Corporate Bond ETF iShares BB Rated Corporate Bond ETF Member ICE BofA BB US High Yield Constrained Index ICE BofA BB US High Yield Constrained Index [Member] ICE BofA BB US High Yield Constrained Index (Returns do not reflect deductions for fees, expenses or taxes) C000204721 [Member] iShares BB Rated Corporate Bond ETF iShares BB Rated Corporate Bond ETF Energy Companies Risk Energy Companies Risk [Member] S000059297 [Member] iShares Broad USD High Yield Corporate Bond ETF iShares Broad USD High Yield Corporate Bond ETF Member HighOneIndex HighOneIndex [Member] ICE BofA US High Yield Constrained Index (Returns do not reflect deductions for fees, expenses or taxes) C000194633 [Member] iShares Broad USD High Yield Corporate Bond ETF iShares Broad USD High Yield Corporate Bond ETF Commodity Risk Commodity Risk [Member] S000035914 [Member] iShares CMBS ETF iShares CMBS ETF Member Bloomberg U S CMBS ERISA Only Index Bloomberg U S CMBS ERISA Only Index [Member] Bloomberg U.S. CMBS (ERISA Only) Index (Returns do not reflect deductions for fees, expenses or taxes) C000110079 [Member] iShares CMBS ETF iShares CMBS ETF Commercial Mortgage Backed Securities Risk Commercial Mortgage Backed Securities Risk [Member] Prepayment Risks Prepayment Risks [Member] U S Agency Mortgage Backed Securities Risk U S Agency Mortgage Backed Securities Risk [Member] S000048637 [Member] iShares Convertible Bond ETF iShares Convertible Bond ETF Member Bloomberg U S Convertible Cash Pay Bond Bloomberg U S Convertible Cash Pay Bond [Member] Bloomberg U.S. Convertible Cash Pay Bond > $250MM Index (Returns do not reflect deductions for fees, expenses or taxes) C000153287 [Member] iShares Convertible Bond ETF iShares Convertible Bond ETF Convertible Securities Risk Convertible Securities Risk [Member] S000054184 [Member] iShares ESG Advanced High Yield Corporate Bond ETF iShares ESG Advanced High Yield Corporate Bond ETF Member Bloomberg MSCI US High Yield Choice ESG Screened Index Bloomberg MSCI US High Yield Choice ESG Screened Index [Member] Bloomberg MSCI US High Yield Choice ESG Screened Index (Returns do not reflect deductions for fees, expenses or taxes) C000170245 [Member] iShares ESG Advanced High Yield Corporate Bond ETF iShares ESG Advanced High Yield Corporate Bond ETF ESG Risk ESG Risk [Member] S000054186 [Member] iShares Fallen Angels USD Bond ETF iShares Fallen Angels USD Bond ETF Member Bloomberg US High Yield Fallen Angel 3 Capped Index Bloomberg US High Yield Fallen Angel 3 Capped Index [Member] Bloomberg US High Yield Fallen Angel 3% Capped Index (Returns do not reflect deductions for fees, expenses or taxes) C000170247 [Member] iShares Fallen Angels USD Bond ETF iShares Fallen Angels USD Bond ETF S000035915 [Member] iShares GNMA Bond ETF iShares GNMA Bond ETF Member Bloomberg U S GNMA Bond Index Bloomberg U S GNMA Bond Index [Member] Bloomberg U.S. GNMA Bond Index (Returns do not reflect deductions for fees, expenses or taxes) C000110080 [Member] iShares GNMA Bond ETF iShares GNMA Bond ETF Risk of Investing in Ginnie Mae Securities Risk of Investing in Ginnie Mae Securities [Member] Cash Transactions Risk Cash Transactions Risk [Member] High Portfolio Turnover Risk High Portfolio Turnover Risk [Member] S000023615 [Member] iShares 1-3 Year International Treasury Bond ETF iShares 1-3 Year International Treasury Bond ETF Member FTSE World Broad Investment Grade Bond Index FTSE World Broad Investment Grade Bond Index [Member] FTSE World Broad Investment-Grade Bond Index (Returns do not reflect deductions for fees, expenses or taxes) FTSE World Government Bond Index Developed Markets Capped Select Index FTSE World Government Bond Index Developed Markets Capped Select Index [Member] FTSE World Government Bond Index – Developed Markets 1-3 Years Capped Select Index (Returns do not reflect deductions for fees, expenses or taxes) C000069478 [Member] iShares 1-3 Year International Treasury Bond ETF iShares 1-3 Year International Treasury Bond ETF S000038926 [Member] iShares Core 1-5 Year USD Bond ETF iShares Core 1-5 Year USD Bond ETF Member Bloomberg U S Universal 1 5 Year Index Bloomberg U S Universal 1 5 Year Index [Member] Bloomberg U.S. Universal 1-5 Year Index (Returns do not reflect deductions for fees, expenses or taxes) C000119711 [Member] iShares Core 1-5 Year USD Bond ETF iShares Core 1-5 Year USD Bond ETF S000051261 [Member] iShares Core International Aggregate Bond ETF iShares Core International Aggregate Bond ETF Member Bloomberg Global Aggregate Bond Index Bloomberg Global Aggregate Bond Index [Member] Bloomberg Global Aggregate Bond Index (Returns do not reflect deductions for fees, expenses or taxes) Bloomberg Global Aggregate ex USD Bloomberg Global Aggregate ex USD [Member] Bloomberg Global Aggregate ex USD 10% Issuer Capped (Hedged) Index (Returns do not reflect deductions for fees, expenses or taxes) C000161648 [Member] iShares Core International Aggregate Bond ETF iShares Core International Aggregate Bond ETF Commodity Regulatory Risk Commodity Regulatory Risk [Member] Currency Hedging Risk Currency Hedging Risk [Member] Custody Risk Custody Risk [Member] Risk of Investing in Emerging Markets Risk of Investing in Emerging Markets [Member] Risk of Investing in Russia Risk of Investing in Russia [Member] Treasury Obligations Risk Treasury Obligations Risk [Member] S000045644 [Member] iShares Core Total USD Bond Market ETF iShares Core Total USD Bond Market ETF Member C000141927 [Member] iShares Core Total USD Bond Market ETF iShares Core Total USD Bond Market ETF S000033136 [Member] iShares Floating Rate Bond ETF iShares Floating Rate Bond ETF Member Bloomberg US Floating Rate Note 5 Years Index Bloomberg US Floating Rate Note 5 Years Index [Member] Bloomberg US Floating Rate Note ˂ 5 Years Index (Returns do not reflect deductions for fees, expenses or taxes) C000102031 [Member] iShares Floating Rate Bond ETF iShares Floating Rate Bond ETF Floating Rate Securities Risk Floating Rate Securities Risk [Member] Supranational Entities Risk Supranational Entities Risk [Member] S000023614 [Member] iShares International Treasury Bond ETF iShares International Treasury Bond ETF Member FtseIndexFour FtseIndexFour [Member] FTSE World Government Bond Index ? Developed Markets Capped Select Index (Returns do not reflect deductions for fees, expenses or taxes) C000069477 [Member] iShares International Treasury Bond ETF iShares International Treasury Bond ETF S000077383 [Member] iShares J.P. Morgan Broad USD Emerging Markets Bond ETF iShares J.P. Morgan Broad USD Emerging Markets Bond ETF Member J P Morgan EMBI Global Diversified Index J P Morgan EMBI Global Diversified Index [Member] J.P. Morgan EMBI Global Diversified Index (Returns do not reflect deductions for fees, expenses or taxes) J P Morgan EM Sovereign and Corporate Credit Core Index J P Morgan EM Sovereign and Corporate Credit Core Index [Member] J.P. Morgan EM Sovereign and Corporate Credit Core Index (Returns do not reflect deductions for fees, expenses or taxes) C000237776 [Member] iShares J.P. Morgan Broad USD Emerging Markets Bond ETF iShares J.P. Morgan Broad USD Emerging Markets Bond ETF S000019798 [Member] iShares J.P. Morgan USD Emerging Markets Bond ETF iShares J.P. Morgan USD Emerging Markets Bond ETF Member J P Morgan EMBI Global Core Index J P Morgan EMBI Global Core Index [Member] J.P. Morgan EMBI Global Core Index (Returns do not reflect deductions for fees, expenses or taxes) C000055529 [Member] iShares J.P. Morgan USD Emerging Markets Bond ETF iShares J.P. Morgan USD Emerging Markets Bond ETF Non U S Agency Debt Risk Non U S Agency Debt Risk [Member] S000060088 [Member] iShares U.S. Fixed Income Balanced Risk Systematic ETF Member iSHARES U.S. FIXED INCOME BALANCED RISK SYSTEMATIC ETF Bloomberg U S Fixed Income Balanced Risk Index Bloomberg U S Fixed Income Balanced Risk Index [Member] Bloomberg U.S. Fixed Income Balanced Risk Index (Returns do not reflect deductions for fees, expenses or taxes) C000196720 [Member] iShares U.S. Fixed Income Balanced Risk Systematic ETF iSHARES U.S. FIXED INCOME BALANCED RISK SYSTEMATIC ETF Balancing Risk Exposure Strategy Risk Balancing Risk Exposure Strategy Risk [Member] Credit Spread Risk Credit Spread Risk [Member] Hedging Risk Hedging Risk [Member] U S Government Issuers Risk U S Government Issuers Risk [Member] S000063466 [Member] iShares USD Green Bond ETF iShares USD Green Bond ETF Member Bloomberg MSCI USD Green Bond Select Index Bloomberg MSCI USD Green Bond Select Index [Member] Bloomberg MSCI USD Green Bond Select Index (Returns do not reflect deductions for fees, expenses or taxes) C000205645 [Member] iShares USD Green Bond ETF iShares USD Green Bond ETF Green Bond Investment Strategy Risk Green Bond Investment Strategy Risk [Member] Utility Companies Risk Utility Companies Risk [Member] S000030481 [Member] iShares 0-5 Year TIPS Bond ETF iShares 0-5 Year TIPS Bond ETF Member ICE U S Treasury 0 5 Year Inflation Linked Bond Index ICE U S Treasury 0 5 Year Inflation Linked Bond Index [Member] ICE U.S. Treasury 0-5 Year Inflation Linked Bond Index (Returns do not reflect deductions for fees, expenses or taxes) C000093655 [Member] iShares 0-5 Year TIPS Bond ETF iShares 0-5 Year TIPS Bond ETF S000063114 [Member] iShares iBonds Dec 2025 Term Muni Bond ETF iShares iBonds Dec 2025 Term Muni Bond ETF Member S And P Municipal Bond Index S And P Municipal Bond Index [Member] S&P Municipal Bond Index (Returns do not reflect deductions for fees, expenses or taxes) S And P AMT Free Municipal Series Dec 2025 Index S And P AMT Free Municipal Series Dec 2025 Index [Member] S&P AMT-Free Municipal Series Dec 2025 Index (Returns do not reflect deductions for fees, expenses or taxes) C000204675 [Member] iShares iBonds Dec 2025 Term Muni Bond ETF iShares iBonds Dec 2025 Term Muni Bond ETF Municipal Securities Risk Municipal Securities Risk [Member] S000063115 [Member] iShares iBonds Dec 2026 Term Muni Bond ETF iShares iBonds Dec 2026 Term Muni Bond ETF Member S And P AMT Free Municipal Series Callable Adjusted Dec 2026 Index S And P AMT Free Municipal Series Callable Adjusted Dec 2026 Index [Member] S&P AMT-Free Municipal Series Callable-Adjusted Dec 2026 Index (Returns do not reflect deductions for fees, expenses or taxes) C000204676 [Member] iShares iBonds Dec 2026 Term Muni Bond ETF iShares iBonds Dec 2026 Term Muni Bond ETF S000065128 [Member] iShares iBonds Dec 2027 Term Muni Bond ETF iShares iBonds Dec 2027 Term Muni Bond ETF Member S And P AMT Free Municipal Series Callable Adjusted Dec 2027 Index S And P AMT Free Municipal Series Callable Adjusted Dec 2027 Index [Member] S&P AMT-Free Municipal Series Callable-Adjusted Dec 2027 Index (Returns do not reflect deductions for fees, expenses or taxes) C000210857 [Member] iShares iBonds Dec 2027 Term Muni Bond ETF iShares iBonds Dec 2027 Term Muni Bond ETF S000065129 [Member] iShares iBonds Dec 2028 Term Muni Bond ETF iShares iBonds Dec 2028 Term Muni Bond ETF Member S And P AMT Free Municipal Series Callable Adjusted Dec 2028 Index S And P AMT Free Municipal Series Callable Adjusted Dec 2028 Index [Member] S&P AMT-Free Municipal Series Callable-Adjusted Dec 2028 Index (Returns do not reflect deductions for fees, expenses or taxes) C000210858 [Member] iShares iBonds Dec 2028 Term Muni Bond ETF iShares iBonds Dec 2028 Term Muni Bond ETF S000080345 [Member] iShares iBonds Dec 2029 Term Muni Bond ETF iShares iBonds Dec 2029 Term Muni Bond ETF Member S And P AMT Free Municipal Series Callable Adjusted Dec 2029 Index S And P AMT Free Municipal Series Callable Adjusted Dec 2029 Index [Member] S&P AMT-Free Municipal Series Callable-Adjusted Dec 2029 Index (Returns do not reflect deductions for fees, expenses or taxes) C000242692 [Member] iShares iBonds Dec 2029 Term Muni Bond ETF iShares iBonds Dec 2029 Term Muni Bond ETF S000085095 [Member] iShares iBonds Dec 2030 Term Muni Bond ETF iShares iBonds Dec 2030 Term Muni Bond ETF Member C000249960 [Member] iShares iBonds Dec 2030 Term Muni Bond ETF iShares iBonds Dec 2030 Term Muni Bond ETF S000080885 [Member] iShares iBonds Oct 2025 Term TIPS ETF iShares iBonds Oct 2025 Term TIPS ETF Member ICE 2025 Maturity US Inflation Linked Treasury Index ICE 2025 Maturity US Inflation Linked Treasury Index [Member] ICE 2025 Maturity US Inflation-Linked Treasury Index (Returns do not reflect deductions for fees, expenses or taxes) C000243457 [Member] iShares iBonds Oct 2025 Term TIPS ETF iShares iBonds Oct 2025 Term TIPS ETF S000080886 [Member] iShares iBonds Oct 2026 Term TIPS ETF iShares iBonds Oct 2026 Term TIPS ETF Member ICE 2026 Maturity US Inflation Linked Treasury Index ICE 2026 Maturity US Inflation Linked Treasury Index [Member] ICE 2026 Maturity US Inflation-Linked Treasury Index (Returns do not reflect deductions for fees, expenses or taxes) C000243458 [Member] iShares iBonds Oct 2026 Term TIPS ETF iShares iBonds Oct 2026 Term TIPS ETF S000080887 [Member] iShares iBonds Oct 2027 Term TIPS ETF iShares iBonds Oct 2027 Term TIPS ETF Member ICE 2027 Maturity US Inflation Linked Treasury Index ICE 2027 Maturity US Inflation Linked Treasury Index [Member] ICE 2027 Maturity US Inflation-Linked Treasury Index (Returns do not reflect deductions for fees, expenses or taxes) C000243459 [Member] iShares iBonds Oct 2027 Term TIPS ETF iShares iBonds Oct 2027 Term TIPS ETF S000080888 [Member] iShares iBonds Oct 2028 Term TIPS ETF iShares iBonds Oct 2028 Term TIPS ETF Member ICE 2028 Maturity US Inflation Linked Treasury Index ICE 2028 Maturity US Inflation Linked Treasury Index [Member] ICE 2028 Maturity US Inflation-Linked Treasury Index (Returns do not reflect deductions for fees, expenses or taxes) C000243460 [Member] iShares iBonds Oct 2028 Term TIPS ETF iShares iBonds Oct 2028 Term TIPS ETF S000080889 [Member] iShares iBonds Oct 2029 Term TIPS ETF iShares iBonds Oct 2029 Term TIPS ETF Member ICE 2029 Maturity US Inflation Linked Treasury Index ICE 2029 Maturity US Inflation Linked Treasury Index [Member] ICE 2029 Maturity US Inflation-Linked Treasury Index (Returns do not reflect deductions for fees, expenses or taxes) C000243461 [Member] iShares iBonds Oct 2029 Term TIPS ETF iShares iBonds Oct 2029 Term TIPS ETF S000080890 [Member] iShares iBonds Oct 2030 Term TIPS ETF iShares iBonds Oct 2030 Term TIPS ETF Member ICE 2030 Maturity US Inflation Linked Treasury Index ICE 2030 Maturity US Inflation Linked Treasury Index [Member] ICE 2030 Maturity US Inflation-Linked Treasury Index (Returns do not reflect deductions for fees, expenses or taxes) C000243462 [Member] iShares iBonds Oct 2030 Term TIPS ETF iShares iBonds Oct 2030 Term TIPS ETF S000080891 [Member] iShares iBonds Oct 2031 Term TIPS ETF iShares iBonds Oct 2031 Term TIPS ETF Member ICE 2031 Maturity US Inflation Linked Treasury Index ICE 2031 Maturity US Inflation Linked Treasury Index [Member] ICE 2031 Maturity US Inflation-Linked Treasury Index (Returns do not reflect deductions for fees, expenses or taxes) C000243463 [Member] iShares iBonds Oct 2031 Term TIPS ETF iShares iBonds Oct 2031 Term TIPS ETF S000080892 [Member] iShares iBonds Oct 2032 Term TIPS ETF iShares iBonds Oct 2032 Term TIPS ETF Member ICE 2032 Maturity US Inflation Linked Treasury Index ICE 2032 Maturity US Inflation Linked Treasury Index [Member] ICE 2032 Maturity US Inflation-Linked Treasury Index (Returns do not reflect deductions for fees, expenses or taxes) C000243464 [Member] iShares iBonds Oct 2032 Term TIPS ETF iShares iBonds Oct 2032 Term TIPS ETF S000080884 [Member] iShares iBonds Oct 2033 Term TIPS ETF iShares iBonds Oct 2033 Term TIPS ETF Member ICE 2033 Maturity US Inflation Linked Treasury Index ICE 2033 Maturity US Inflation Linked Treasury Index [Member] ICE 2033 Maturity US Inflation-Linked Treasury Index (Returns do not reflect deductions for fees, expenses or taxes) C000243456 [Member] iShares iBonds Oct 2033 Term TIPS ETF iShares iBonds Oct 2033 Term TIPS ETF S000085097 [Member] iShares iBonds Oct 2034 Term TIPS ETF iShares iBonds Oct 2034 Term TIPS ETF Member C000249962 [Member] iShares iBonds Oct 2034 Term TIPS ETF iShares iBonds Oct 2034 Term TIPS ETF S000004363 [Member] iShares TIPS Bond ETF iShares TIPS Bond ETF Member ICE U S Treasury Inflation Linked Bond Index ICE U S Treasury Inflation Linked Bond Index [Member] ICE U.S. Treasury Inflation Linked Bond Index (Returns do not reflect deductions for fees, expenses or taxes) C000012093 [Member] iShares TIPS Bond ETF iShares TIPS Bond ETF S000067560 [Member] iShares iBonds Dec 2025 Term Treasury ETF iShares iBonds Dec 2025 Term Treasury ETF Member ICE 2025 Maturity US Treasury Index ICE 2025 Maturity US Treasury Index [Member] ICE 2025 Maturity US Treasury Index (Returns do not reflect deductions for fees, expenses or taxes) C000217186 [Member] iShares iBonds Dec 2025 Term Treasury ETF iShares iBonds Dec 2025 Term Treasury ETF S000067561 [Member] iShares iBonds Dec 2026 Term Treasury ETF iShares iBonds Dec 2026 Term Treasury ETF Member ICE 2026 Maturity US Treasury Index ICE 2026 Maturity US Treasury Index [Member] ICE 2026 Maturity US Treasury Index (Returns do not reflect deductions for fees, expenses or taxes) C000217187 [Member] iShares iBonds Dec 2026 Term Treasury ETF iShares iBonds Dec 2026 Term Treasury ETF S000067562 [Member] iShares iBonds Dec 2027 Term Treasury ETF iShares iBonds Dec 2027 Term Treasury ETF Member ICE 2027 Maturity US Treasury Index ICE 2027 Maturity US Treasury Index [Member] ICE 2027 Maturity US Treasury Index (Returns do not reflect deductions for fees, expenses or taxes) C000217188 [Member] iShares iBonds Dec 2027 Term Treasury ETF iShares iBonds Dec 2027 Term Treasury ETF S000067563 [Member] iShares iBonds Dec 2028 Term Treasury ETF iShares iBonds Dec 2028 Term Treasury ETF Member ICE 2028 Maturity US Treasury Index ICE 2028 Maturity US Treasury Index [Member] ICE 2028 Maturity US Treasury Index (Returns do not reflect deductions for fees, expenses or taxes) C000217189 [Member] iShares iBonds Dec 2028 Term Treasury ETF iShares iBonds Dec 2028 Term Treasury ETF S000067564 [Member] iShares iBonds Dec 2029 Term Treasury ETF iShares iBonds Dec 2029 Term Treasury ETF Member ICE 2029 Maturity US Treasury Index ICE 2029 Maturity US Treasury Index [Member] ICE 2029 Maturity US Treasury Index (Returns do not reflect deductions for fees, expenses or taxes) C000217190 [Member] iShares iBonds Dec 2029 Term Treasury ETF iShares iBonds Dec 2029 Term Treasury ETF S000068912 [Member] iShares iBonds Dec 2030 Term Treasury ETF iShares iBonds Dec 2030 Term Treasury ETF Member ICE 2030 Maturity US Treasury Index ICE 2030 Maturity US Treasury Index [Member] ICE 2030 Maturity US Treasury Index (Returns do not reflect deductions for fees, expenses or taxes) C000220170 [Member] iShares iBonds Dec 2030 Term Treasury ETF iShares iBonds Dec 2030 Term Treasury ETF S000072402 [Member] iShares iBonds Dec 2031 Term Treasury ETF iShares iBonds Dec 2031 Term Treasury ETF Member ICE 2031 Maturity US Treasury Index ICE 2031 Maturity US Treasury Index [Member] ICE 2031 Maturity US Treasury Index (Returns do not reflect deductions for fees, expenses or taxes) C000228602 [Member] iShares iBonds Dec 2031 Term Treasury ETF iShares iBonds Dec 2031 Term Treasury ETF S000076714 [Member] iShares iBonds Dec 2032 Term Treasury ETF iShares iBonds Dec 2032 Term Treasury ETF Member ICE 2032 Maturity US Treasury Index ICE 2032 Maturity US Treasury Index [Member] ICE 2032 Maturity US Treasury Index (Returns do not reflect deductions for fees, expenses or taxes) C000236733 [Member] iShares iBonds Dec 2032 Term Treasury ETF iShares iBonds Dec 2032 Term Treasury ETF S000080644 [Member] iShares iBonds Dec 2033 Term Treasury ETF iShares iBonds Dec 2033 Term Treasury ETF Member ICE 2033 Maturity US Treasury Index ICE 2033 Maturity US Treasury Index [Member] ICE 2033 Maturity US Treasury Index (Returns do not reflect deductions for fees, expenses or taxes) C000243160 [Member] iShares iBonds Dec 2033 Term Treasury ETF iShares iBonds Dec 2033 Term Treasury ETF S000085229 [Member] iShares iBonds Dec 2034 Term Treasury ETF iShares iBonds Dec 2034 Term Treasury ETF Member C000250196 [Member] iShares iBonds Dec 2034 Term Treasury ETF iShares iBonds Dec 2034 Term Treasury ETF S000085230 [Member] iShares iBonds Dec 2044 Term Treasury ETF iShares iBonds Dec 2044 Term Treasury ETF Member C000250197 [Member] iShares iBonds Dec 2044 Term Treasury ETF iShares iBonds Dec 2044 Term Treasury ETF S000085232 [Member] iShares iBonds Dec 2054 Term Treasury ETF iShares iBonds Dec 2054 Term Treasury ETF Member C000250199 [Member] iShares iBonds Dec 2054 Term Treasury ETF iShares iBonds Dec 2054 Term Treasury ETF S000044143 [Member] iShares Treasury Floating Rate Bond ETF iShares Treasury Floating Rate Bond ETF Member Bloomberg U S Treasury Floating Rate Index Bloomberg U S Treasury Floating Rate Index [Member] Bloomberg U.S. Treasury Floating Rate Index (Returns do not reflect deductions for fees, expenses or taxes) C000137225 [Member] iShares Treasury Floating Rate Bond ETF iShares Treasury Floating Rate Bond ETF S000035919 [Member] iShares U.S. Treasury Bond ETF iShares U.S. Treasury Bond ETF Member ICE U S Treasury Core Bond Index ICE U S Treasury Core Bond Index [Member] ICE U.S. Treasury Core Bond Index (Returns do not reflect deductions for fees, expenses or taxes) C000110086 [Member] iShares U.S. Treasury Bond ETF iShares U.S. Treasury Bond ETF