110002 - Disclosure - S000013697 [Member] Investment Objectives and Goals
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210002 - Disclosure - S000013698 [Member] Investment Objectives and Goals
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210004 - Disclosure - S000013698 [Member] Investment Strategy
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1010002 - Disclosure - S000004361 [Member] Investment Objectives and Goals
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1010001 - Disclosure - S000004361 [Member] N-1A Supplement
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1120060 - Disclosure - S000057342 [Member] Average Annual Total Returns
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1110001 - Disclosure - S000057342 [Member] N-1A Supplement
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1220050 - Disclosure - S000013694 [Member] Annual Total Returns
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1220060 - Disclosure - S000013694 [Member] Average Annual Total Returns
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1210001 - Disclosure - S000013694 [Member] N-1A Supplement
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1320020 - Disclosure - S000068768 [Member] Annual Fund Operating Expenses
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1320030 - Disclosure - S000068768 [Member] Expense Example
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1320045 - Disclosure - S000068768 [Member] Risks Data
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1320050 - Disclosure - S000068768 [Member] Annual Total Returns
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1320060 - Disclosure - S000068768 [Member] Average Annual Total Returns
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1320070 - Disclosure - S000068768 [Member] Market Index Performance
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1310000 - Disclosure - S000068768 [Member] N-1A Cover
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1310001 - Disclosure - S000068768 [Member] N-1A Supplement
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1420020 - Disclosure - S000004357 [Member] Annual Fund Operating Expenses
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1420040 - Disclosure - S000004357 [Member] Expense Example, No Redemption
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1420045 - Disclosure - S000004357 [Member] Risks Data
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1420050 - Disclosure - S000004357 [Member] Annual Total Returns
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1420060 - Disclosure - S000004357 [Member] Average Annual Total Returns
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link:definitionLink
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1420070 - Disclosure - S000004357 [Member] Market Index Performance
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1410000 - Disclosure - S000004357 [Member] N-1A Cover
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1410001 - Disclosure - S000004357 [Member] N-1A Supplement
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1510002 - Disclosure - S000013695 [Member] Investment Objectives and Goals
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1510003 - Disclosure - S000013695 [Member] Fees and Expenses
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2420050 - Disclosure - S000018861 [Member] Annual Total Returns
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2520050 - Disclosure - S000019342 [Member] Annual Total Returns
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2520060 - Disclosure - S000019342 [Member] Average Annual Total Returns
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2520070 - Disclosure - S000019342 [Member] Market Index Performance
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2620050 - Disclosure - S000023507 [Member] Annual Total Returns
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2620060 - Disclosure - S000023507 [Member] Average Annual Total Returns
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2620070 - Disclosure - S000023507 [Member] Market Index Performance
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2720050 - Disclosure - S000099941 [Member] Annual Total Returns
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2720060 - Disclosure - S000099941 [Member] Average Annual Total Returns
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2720070 - Disclosure - S000099941 [Member] Market Index Performance
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2820050 - Disclosure - S000055401 [Member] Annual Total Returns
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2820060 - Disclosure - S000055401 [Member] Average Annual Total Returns
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2820070 - Disclosure - S000055401 [Member] Market Index Performance
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2810001 - Disclosure - S000055401 [Member] N-1A Supplement
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link:definitionLink
link:calculationLink
2910004 - Disclosure - S000026652 [Member] Investment Strategy
link:presentationLink
link:definitionLink
link:calculationLink
2910005 - Disclosure - S000026652 [Member] Investment Risks
link:presentationLink
link:definitionLink
link:calculationLink
2910006 - Disclosure - S000026652 [Member] Performance Management
link:presentationLink
link:definitionLink
link:calculationLink
2920010 - Disclosure - S000026652 [Member] Shareholder Fees
link:presentationLink
link:definitionLink
link:calculationLink
2920020 - Disclosure - S000026652 [Member] Annual Fund Operating Expenses
link:presentationLink
link:definitionLink
link:calculationLink
2920030 - Disclosure - S000026652 [Member] Expense Example
link:presentationLink
link:definitionLink
link:calculationLink
2920040 - Disclosure - S000026652 [Member] Expense Example, No Redemption
link:presentationLink
link:definitionLink
link:calculationLink
2920045 - Disclosure - S000026652 [Member] Risks Data
link:presentationLink
link:definitionLink
link:calculationLink
2920050 - Disclosure - S000026652 [Member] Annual Total Returns
link:presentationLink
link:definitionLink
link:calculationLink
2920060 - Disclosure - S000026652 [Member] Average Annual Total Returns
link:presentationLink
link:definitionLink
link:calculationLink
2920070 - Disclosure - S000026652 [Member] Market Index Performance
link:presentationLink
link:definitionLink
link:calculationLink
2910000 - Disclosure - S000026652 [Member] N-1A Cover
link:presentationLink
link:definitionLink
link:calculationLink
2910001 - Disclosure - S000026652 [Member] N-1A Supplement
link:presentationLink
link:definitionLink
link:calculationLink
3010002 - Disclosure - S000004362 [Member] Investment Objectives and Goals
link:presentationLink
link:definitionLink
link:calculationLink
3010003 - Disclosure - S000004362 [Member] Fees and Expenses
link:presentationLink
link:definitionLink
link:calculationLink
3010004 - Disclosure - S000004362 [Member] Investment Strategy
link:presentationLink
link:definitionLink
link:calculationLink
3010005 - Disclosure - S000004362 [Member] Investment Risks
link:presentationLink
link:definitionLink
link:calculationLink
3010006 - Disclosure - S000004362 [Member] Performance Management
link:presentationLink
link:definitionLink
link:calculationLink
3020010 - Disclosure - S000004362 [Member] Shareholder Fees
link:presentationLink
link:definitionLink
link:calculationLink
3020020 - Disclosure - S000004362 [Member] Annual Fund Operating Expenses
link:presentationLink
link:definitionLink
link:calculationLink
3020030 - Disclosure - S000004362 [Member] Expense Example
link:presentationLink
link:definitionLink
link:calculationLink
3020040 - Disclosure - S000004362 [Member] Expense Example, No Redemption
link:presentationLink
link:definitionLink
link:calculationLink
3020045 - Disclosure - S000004362 [Member] Risks Data
link:presentationLink
link:definitionLink
link:calculationLink
3020050 - Disclosure - S000004362 [Member] Annual Total Returns
link:presentationLink
link:definitionLink
link:calculationLink
3020060 - Disclosure - S000004362 [Member] Average Annual Total Returns
link:presentationLink
link:definitionLink
link:calculationLink
3020070 - Disclosure - S000004362 [Member] Market Index Performance
link:presentationLink
link:definitionLink
link:calculationLink
3010000 - Disclosure - S000004362 [Member] N-1A Cover
link:presentationLink
link:definitionLink
link:calculationLink
3010001 - Disclosure - S000004362 [Member] N-1A Supplement
link:presentationLink
link:definitionLink
link:calculationLink
3110002 - Disclosure - S000068817 [Member] Investment Objectives and Goals
link:presentationLink
link:definitionLink
link:calculationLink
3110003 - Disclosure - S000068817 [Member] Fees and Expenses
link:presentationLink
link:definitionLink
link:calculationLink
3110004 - Disclosure - S000068817 [Member] Investment Strategy
link:presentationLink
link:definitionLink
link:calculationLink
3110005 - Disclosure - S000068817 [Member] Investment Risks
link:presentationLink
link:definitionLink
link:calculationLink
3110006 - Disclosure - S000068817 [Member] Performance Management
link:presentationLink
link:definitionLink
link:calculationLink
3120010 - Disclosure - S000068817 [Member] Shareholder Fees
link:presentationLink
link:definitionLink
link:calculationLink
3120020 - Disclosure - S000068817 [Member] Annual Fund Operating Expenses
link:presentationLink
link:definitionLink
link:calculationLink
3120030 - Disclosure - S000068817 [Member] Expense Example
link:presentationLink
link:definitionLink
link:calculationLink
3120040 - Disclosure - S000068817 [Member] Expense Example, No Redemption
link:presentationLink
link:definitionLink
link:calculationLink
3120045 - Disclosure - S000068817 [Member] Risks Data
link:presentationLink
link:definitionLink
link:calculationLink
3120050 - Disclosure - S000068817 [Member] Annual Total Returns
link:presentationLink
link:definitionLink
link:calculationLink
3120060 - Disclosure - S000068817 [Member] Average Annual Total Returns
link:presentationLink
link:definitionLink
link:calculationLink
3120070 - Disclosure - S000068817 [Member] Market Index Performance
link:presentationLink
link:definitionLink
link:calculationLink
3110000 - Disclosure - S000068817 [Member] N-1A Cover
link:presentationLink
link:definitionLink
link:calculationLink
3110001 - Disclosure - S000068817 [Member] N-1A Supplement
link:presentationLink
link:definitionLink
link:calculationLink
3210002 - Disclosure - S000062159 [Member] Investment Objectives and Goals
link:presentationLink
link:definitionLink
link:calculationLink
3210003 - Disclosure - S000062159 [Member] Fees and Expenses
link:presentationLink
link:definitionLink
link:calculationLink
3210004 - Disclosure - S000062159 [Member] Investment Strategy
link:presentationLink
link:definitionLink
link:calculationLink
3210005 - Disclosure - S000062159 [Member] Investment Risks
link:presentationLink
link:definitionLink
link:calculationLink
3210006 - Disclosure - S000062159 [Member] Performance Management
link:presentationLink
link:definitionLink
link:calculationLink
3220010 - Disclosure - S000062159 [Member] Shareholder Fees
link:presentationLink
link:definitionLink
link:calculationLink
3220020 - Disclosure - S000062159 [Member] Annual Fund Operating Expenses
link:presentationLink
link:definitionLink
link:calculationLink
3220030 - Disclosure - S000062159 [Member] Expense Example
link:presentationLink
link:definitionLink
link:calculationLink
3220040 - Disclosure - S000062159 [Member] Expense Example, No Redemption
link:presentationLink
link:definitionLink
link:calculationLink
3220045 - Disclosure - S000062159 [Member] Risks Data
link:presentationLink
link:definitionLink
link:calculationLink
3220050 - Disclosure - S000062159 [Member] Annual Total Returns
link:presentationLink
link:definitionLink
link:calculationLink
3220060 - Disclosure - S000062159 [Member] Average Annual Total Returns
link:presentationLink
link:definitionLink
link:calculationLink
3220070 - Disclosure - S000062159 [Member] Market Index Performance
link:presentationLink
link:definitionLink
link:calculationLink
3210000 - Disclosure - S000062159 [Member] N-1A Cover
link:presentationLink
link:definitionLink
link:calculationLink
3210001 - Disclosure - S000062159 [Member] N-1A Supplement
link:presentationLink
link:definitionLink
link:calculationLink
3310002 - Disclosure - S000013701 [Member] Investment Objectives and Goals
link:presentationLink
link:definitionLink
link:calculationLink
3310003 - Disclosure - S000013701 [Member] Fees and Expenses
link:presentationLink
link:definitionLink
link:calculationLink
3310004 - Disclosure - S000013701 [Member] Investment Strategy
link:presentationLink
link:definitionLink
link:calculationLink
3310005 - Disclosure - S000013701 [Member] Investment Risks
link:presentationLink
link:definitionLink
link:calculationLink
3310006 - Disclosure - S000013701 [Member] Performance Management
link:presentationLink
link:definitionLink
link:calculationLink
3320010 - Disclosure - S000013701 [Member] Shareholder Fees
link:presentationLink
link:definitionLink
link:calculationLink
3320020 - Disclosure - S000013701 [Member] Annual Fund Operating Expenses
link:presentationLink
link:definitionLink
link:calculationLink
3320030 - Disclosure - S000013701 [Member] Expense Example
link:presentationLink
link:definitionLink
link:calculationLink
3320040 - Disclosure - S000013701 [Member] Expense Example, No Redemption
link:presentationLink
link:definitionLink
link:calculationLink
3320045 - Disclosure - S000013701 [Member] Risks Data
link:presentationLink
link:definitionLink
link:calculationLink
3320050 - Disclosure - S000013701 [Member] Annual Total Returns
link:presentationLink
link:definitionLink
link:calculationLink
3320060 - Disclosure - S000013701 [Member] Average Annual Total Returns
link:presentationLink
link:definitionLink
link:calculationLink
3320070 - Disclosure - S000013701 [Member] Market Index Performance
link:presentationLink
link:definitionLink
link:calculationLink
3310000 - Disclosure - S000013701 [Member] N-1A Cover
link:presentationLink
link:definitionLink
link:calculationLink
3310001 - Disclosure - S000013701 [Member] N-1A Supplement
link:presentationLink
link:definitionLink
link:calculationLink
3410002 - Disclosure - S000013700 [Member] Investment Objectives and Goals
link:presentationLink
link:definitionLink
link:calculationLink
3410003 - Disclosure - S000013700 [Member] Fees and Expenses
link:presentationLink
link:definitionLink
link:calculationLink
3410004 - Disclosure - S000013700 [Member] Investment Strategy
link:presentationLink
link:definitionLink
link:calculationLink
3410005 - Disclosure - S000013700 [Member] Investment Risks
link:presentationLink
link:definitionLink
link:calculationLink
3410006 - Disclosure - S000013700 [Member] Performance Management
link:presentationLink
link:definitionLink
link:calculationLink
3420010 - Disclosure - S000013700 [Member] Shareholder Fees
link:presentationLink
link:definitionLink
link:calculationLink
3420020 - Disclosure - S000013700 [Member] Annual Fund Operating Expenses
link:presentationLink
link:definitionLink
link:calculationLink
3420030 - Disclosure - S000013700 [Member] Expense Example
link:presentationLink
link:definitionLink
link:calculationLink
3420040 - Disclosure - S000013700 [Member] Expense Example, No Redemption
link:presentationLink
link:definitionLink
link:calculationLink
3420045 - Disclosure - S000013700 [Member] Risks Data
link:presentationLink
link:definitionLink
link:calculationLink
3420050 - Disclosure - S000013700 [Member] Annual Total Returns
link:presentationLink
link:definitionLink
link:calculationLink
3420060 - Disclosure - S000013700 [Member] Average Annual Total Returns
link:presentationLink
link:definitionLink
link:calculationLink
3420070 - Disclosure - S000013700 [Member] Market Index Performance
link:presentationLink
link:definitionLink
link:calculationLink
3410000 - Disclosure - S000013700 [Member] N-1A Cover
link:presentationLink
link:definitionLink
link:calculationLink
3410001 - Disclosure - S000013700 [Member] N-1A Supplement
link:presentationLink
link:definitionLink
link:calculationLink
3510002 - Disclosure - S000097904 [Member] Investment Objectives and Goals
link:presentationLink
link:definitionLink
link:calculationLink
3510003 - Disclosure - S000097904 [Member] Fees and Expenses
link:presentationLink
link:definitionLink
link:calculationLink
3510004 - Disclosure - S000097904 [Member] Investment Strategy
link:presentationLink
link:definitionLink
link:calculationLink
3510005 - Disclosure - S000097904 [Member] Investment Risks
link:presentationLink
link:definitionLink
link:calculationLink
3510006 - Disclosure - S000097904 [Member] Performance Management
link:presentationLink
link:definitionLink
link:calculationLink
3520010 - Disclosure - S000097904 [Member] Shareholder Fees
link:presentationLink
link:definitionLink
link:calculationLink
3520020 - Disclosure - S000097904 [Member] Annual Fund Operating Expenses
link:presentationLink
link:definitionLink
link:calculationLink
3520030 - Disclosure - S000097904 [Member] Expense Example
link:presentationLink
link:definitionLink
link:calculationLink
3520040 - Disclosure - S000097904 [Member] Expense Example, No Redemption
link:presentationLink
link:definitionLink
link:calculationLink
3520045 - Disclosure - S000097904 [Member] Risks Data
link:presentationLink
link:definitionLink
link:calculationLink
3520050 - Disclosure - S000097904 [Member] Annual Total Returns
link:presentationLink
link:definitionLink
link:calculationLink
3520060 - Disclosure - S000097904 [Member] Average Annual Total Returns
link:presentationLink
link:definitionLink
link:calculationLink
3520070 - Disclosure - S000097904 [Member] Market Index Performance
link:presentationLink
link:definitionLink
link:calculationLink
3510000 - Disclosure - S000097904 [Member] N-1A Cover
link:presentationLink
link:definitionLink
link:calculationLink
3510001 - Disclosure - S000097904 [Member] N-1A Supplement
link:presentationLink
link:definitionLink
link:calculationLink
iShares 1-5 Year Investment Grade Corporate Bond ETF
S000013697 [Member]
ICE BofA US Broad Market Index (Returns do not reflect deductions for fees, expenses or taxes)
S000013697 ICE BofA US Broad Market Index [Member]
ICE BofA 1-5 Year US Corporate Index (Spliced) (Returns do not reflect deductions for fees, expenses or taxes)
S000013697 ICE BofA 15 Year US Corporate Index [Member]
C000037539 [Member]
Interest Rate Risks [Member]
Market Risks [Member]
Index Related Risk [Member]
Asset Class Risk [Member]
Authorized Participant Concentration Risk [Member]
Call Risk [Member]
Concentration Risk [Member]
Currency Risk [Member]
Financial Companies Risk [Member]
Income Risk [Member]
Issuer Risk [Member]
Management Risk [Member]
Market Trading Risk [Member]
National Closed Market Trading Risk [Member]
Non US Securities Risk [Member]
Operational and Technology Risks [Member]
Privately Issued Securities Risk [Member]
Reliance on Trading Partners Risk [Member]
Risk of Investing in China [Member]
Risk of Investing in the China Bond Market [Member]
Risk of Investing in Developed Countries [Member]
Risk of Investing in Saudi Arabia [Member]
Risk of Investing in the US [Member]
Securities Lending Risk [Member]
Tracking Error Risk [Member]
Valuation Risk [Member]
Credit Risks [Member]
iShares 5-10 Year Investment Grade Corporate Bond ETF
S000013698 [Member]
S000013698 ICE BofA US Broad Market Index [Member]
ICE BofA 5-10 Year US Corporate Index (Spliced) (Returns do not reflect deductions for fees, expenses or taxes)
S000013698 ICE BofA 510 Year US Corporate Index [Member]
C000037540 [Member]
iShares 10+ Year Investment Grade Corporate Bond ETF
S000026651 [Member]
S000026651 ICE BofA US Broad Market Index [Member]
ICE BofA 10+ Year US Corporate Index (Spliced) (Returns do not reflect deductions for fees, expenses or taxes)
S000026651 ICE BofA 10 Year US Corporate Index [Member]
C000080009 [Member]
iShares BBB Rated Corporate Bond ETF
S000071770 [Member]
Bloomberg U.S. Universal Index (Returns do not reflect deductions for fees, expenses or taxes)
S000071770 Bloomberg US Universal Index [Member]
iBoxx USD Liquid Investment Grade BBB 0+ Index (Returns do not reflect deductions for fees, expenses or taxes)
S000071770 iBoxx USD Liquid Investment Grade BBB 0 Index [Member]
C000227271 [Member]
Illiquid Investments Risk [Member]
Consumer Goods and Services Companies Risk [Member]
Assets Under Management AUM Risk [Member]
iShares Broad USD Investment Grade Corporate Bond ETF
S000013699 [Member]
S000013699 ICE BofA US Broad Market Index [Member]
ICE BofA US Corporate Index (Spliced) (Returns do not reflect deductions for fees, expenses or taxes)
S000013699 ICE BofA US Corporate Index Spliced [Member]
C000037541 [Member]
iShares ESG Aware 1-5 Year USD Corporate Bond ETF
S000058036 [Member]
S000058036 Bloomberg U S Universal Index [Member]
Bloomberg MSCI US Corporate 1-5 Year ESG Focus Index (Returns do not reflect deductions for fees, expenses or taxes)
S000058036 Bloomberg M S C I U S Corporate 1 5 Year E S G Focus Index [Member]
C000189864 [Member]
E S G Risk [Member]
iShares ESG Aware USD Corporate Bond ETF
S000058037 [Member]
S000058037 Bloomberg U S Universal Index [Member]
Bloomberg MSCI US Corporate ESG Focus Index (Returns do not reflect deductions for fees, expenses or taxes)
S000058037 Bloomberg M S C I U S Corporate E S G Focus Index [Member]
C000189865 [Member]
iShares High Yield Systematic Bond ETF
S000057341 [Member]
S000057341 Bloomberg U S Universal Index [Member]
BlackRock High Yield Systematic Bond Index (Returns do not reflect deductions for fees, expenses or taxes)
S000057341 BlackRock High Yield Systematic Bond Index [Member]
C000182992 [Member]
High Yield Securities Risk [Member]
Energy Companies Risk [Member]
iShares iBoxx $ High Yield Corporate Bond ETF
S000016772 [Member]
S000016772 Bloomberg U S Universal Index [Member]
iBoxx USD Liquid High Yield Index (Returns do not reflect deductions for fees, expenses or taxes)
S000016772 Iboxx U S D Liquid High Yield Index [Member]
C000046846 [Member]
iShares iBoxx $ Investment Grade Corporate Bond ETF
S000004361 [Member]
S000004361 Bloomberg U S Universal Index [Member]
iBoxx USD Liquid Investment Grade Index (Returns do not reflect deductions for fees, expenses or taxes)
S000004361 Iboxx U S D Liquid Investment Grade Index [Member]
C000012091 [Member]
iShares Investment Grade Systematic Bond ETF
S000057342 [Member]
S000057342 Bloomberg U S Universal Index [Member]
BlackRock Investment Grade Systematic Bond Index (Returns do not reflect deductions for fees, expenses or taxes)
BlackRock Investment Grade Systematic Bond Index [Member]
C000182993 [Member]
iShares 0-1 Year Treasury Bond ETF
S000013694 [Member]
S000013694 ICE B Of A US Broad Market Index [Member]
ICE Short US Treasury Securities Index (Spliced) (Returns do not reflect deductions for fees, expenses or taxes)
ICE Short US Treasury Securities Index Spliced [Member]
C000037536 [Member]
High Portfolio Turnover Risk [Member]
U S Treasury Obligations Risk [Member]
iShares 0-3 Month Treasury Bond ETF
S000068768 [Member]
S000068768 ICE B Of A US Broad Market Index [Member]
ICE 0-3 Month US Treasury Securities Index (Spliced) (Returns do not reflect deductions for fees, expenses or taxes)
ICE 0 To 3 Month US Treasury Securities Index Spliced [Member]
C000219740 [Member]
iShares 1-3 Year Treasury Bond ETF
S000004357 [Member]
S000004357 ICE B Of A US Broad Market Index [Member]
ICE U.S. Treasury 1-3 Year Bond Index (Spliced) (Returns do not reflect deductions for fees, expenses or taxes)
ICE U S Treasury 1 To 3 Year Bond Index Spliced [Member]
C000012087 [Member]
iShares 3-7 Year Treasury Bond ETF
S000013695 [Member]
S000013695 ICE B Of A US Broad Market Index [Member]
ICE U.S. Treasury 3-7 Year Bond Index (Spliced) (Returns do not reflect deductions for fees, expenses or taxes)
ICE U S Treasury 3 To 7 Year Bond Index Spliced [Member]
C000037537 [Member]
iShares 7-10 Year Treasury Bond ETF
S000004358 [Member]
S000004358 ICE BofA US Broad Market Index [Member]
ICE U.S. Treasury 7-10 Year Bond Index (Spliced) (Returns do not reflect deductions for fees, expenses or taxes)
ICE U S Treasury 7 10 Year Bond Index Spliced [Member]
C000012088 [Member]
iShares 10-20 Year Treasury Bond ETF
S000013696 [Member]
S000013696 ICE BofA US Broad Market Index [Member]
ICE U.S. Treasury 10-20 Year Bond Index (Spliced) (Returns do not reflect deductions for fees, expenses or taxes)
ICE U S Treasury 10 20 Year Bond Index Spliced [Member]
C000037538 [Member]
iShares 20+ Year Treasury Bond ETF
S000004360 [Member]
S000004360 ICE BofA US Broad Market Index [Member]
ICE U.S. Treasury 20+ Year Bond Index (Spliced) (Returns do not reflect deductions for fees, expenses or taxes)
ICE U S Treasury 20 Year Bond Index Spliced [Member]
C000012090 [Member]
iShares 25+ Year Treasury STRIPS Bond ETF
S000069558 [Member]
S000069558 ICE BofA US Broad Market Index [Member]
ICE BofA Long US Treasury Principal STRIPS Index (Spliced) (Returns do not reflect deductions for fees, expenses or taxes)
ICE BofA Long US Treasury Principal STRIPS Index Spliced [Member]
C000221912 [Member]
Risk of Investing in U S Treasury STRIPS [Member]
iShares Agency Bond ETF
S000023506 [Member]
S000023506 Bloomberg U S Universal Index [Member]
Bloomberg U.S. Agency Bond Index (Returns do not reflect deductions for fees, expenses or taxes)
Bloomberg U S Agency Bond Index [Member]
C000069125 [Member]
Extension Risk [Member]
Prepayment Risks [Member]
Sovereign and Quasi Sovereign Obligations Risk [Member]
U S Government Issuers Risk [Member]
U S Agency Debt Risk [Member]
iShares California Muni Bond ETF
S000019341 [Member]
ICE BofA US Municipal Securities Index (Returns do not reflect deductions for fees, expenses or taxes)
ICE BofA US Municipal Securities Index [Member]
ICE AMT-Free California Municipal Index (Spliced) (Returns do not reflect deductions for fees, expenses or taxes)
ICE AMT Free California Municipal Index Spliced [Member]
ICE AMT-Free US National Municipal Index (Returns do not reflect deductions for fees, expenses or taxes)
ICE AMT Free US National Municipal Index [Member]
C000053739 [Member]
Municipal Securities Risk [Member]
Interest Rate Risk [Member]
Credit Risk [Member]
Large Shareholder and Large Scale Redemption Risk [Member]
Tax Risk [Member]
California Municipal Securities Risk [Member]
iShares Long-Term National Muni Bond ETF
S000091081 [Member]
C000258476 [Member]
New York Municipal Securities Risk [Member]
Small Fund Risk [Member]
iShares MBS ETF
S000013702 [Member]
S000013702 Bloomberg U S Universal Index [Member]
Bloomberg U.S. MBS Index (Returns do not reflect deductions for fees, expenses or taxes)
Bloomberg U S MBS Index [Member]
C000037544 [Member]
Prepayment Risk [Member]
U S Agency Mortgage Backed Securities Risk [Member]
iShares National Muni Bond ETF
S000018861 [Member]
ICE AMT-Free US National Municipal Index (Spliced) (Returns do not reflect deductions for fees, expenses or taxes)
ICE AMT Free US National Municipal Index Spliced [Member]
C000052220 [Member]
iShares New York Muni Bond ETF
S000019342 [Member]
S000019342 ICE BofA US Municipal Securities Index [Member]
S000019342 ICE AMT Free US National Municipal Index [Member]
ICE AMT-Free New York Plus Municipal Index (Spliced) (Returns do not reflect deductions for fees, expenses or taxes)
ICE AMT Free New York Plus Municipal Index Spliced [Member]
C000053740 [Member]
iShares Short-Term National Muni Bond ETF
S000023507 [Member]
S000023507 ICE BofA US Municipal Securities Index [Member]
ICE Short Maturity AMT-Free US National Municipal Index (Spliced) (Returns do not reflect deductions for fees, expenses or taxes)
ICE Short Maturity AMT Free US National Municipal Index Spliced [Member]
S000023507 ICE AMT Free US National Municipal Index [Member]
C000069126 [Member]
iShares Broad USD Floating Rate Loan ETF
S000099941 [Member]
C000269746 [Member]
Floating Rate Securities Risk [Member]
Industrial Companies Risk [Member]
Technology Companies Risk [Member]
Leveraged Loans Risk [Member]
iShares Core 5-10 Year USD Bond ETF
S000055401 [Member]
S000055401 Bloomberg U S Universal Index
Bloomberg US Universal 5-10 Year Index (Returns do not reflect deductions for fees, expenses or taxes)
Bloomberg US Universal 5 10 Year Index [Member]
C000174365 [Member]
Risk of Investing in Russia [Member]
iShares Core 10+ Year USD Bond ETF
S000026652 [Member]
S000026652 Bloomberg U S Universal Index [Member]
Bloomberg U.S. Universal 10+ Year Index (Returns do not reflect deductions for fees, expenses or taxes)
Bloomberg U S Universal 10 Year Index [Member]
C000080010 [Member]
iShares Core U.S. Aggregate Bond ETF
S000004362 [Member]
S000004362 Bloomberg U S Universal Index [Member]
Bloomberg U.S. Aggregate Bond Index (Returns do not reflect deductions for fees, expenses or taxes)
Bloomberg U S Aggregate Bond Index [Member]
C000012092 [Member]
iShares ESG Advanced Universal USD Bond ETF
S000068817 [Member]
S000068817 Bloomberg U S Universal Index [Member]
Bloomberg MSCI US Universal Choice ESG Screened Index (Returns do not reflect deductions for fees, expenses or taxes)
Bloomberg MSCI US Universal Choice ESG Screened Index [Member]
C000219898 [Member]
iShares ESG Aware U.S. Aggregate Bond ETF
S000062159 [Member]
S000062159 Bloomberg U S Universal Index
Bloomberg MSCI US Aggregate ESG Focus Index (Returns do not reflect deductions for fees, expenses or taxes)
Bloomberg MSCI US Aggregate ESG Focus Index [Member]
C000201167 [Member]
iShares Government/Credit Bond ETF
S000013701 [Member]
S000013701 Bloomberg U S Universal Index [Member]
Bloomberg U.S. Government/Credit Bond Index (Returns do not reflect deductions for fees, expenses or taxes)
Bloomberg U S Government Credit Bond Index [Member]
C000037543 [Member]
iShares Intermediate Government/Credit Bond ETF
S000013700 [Member]
S000013700 Bloomberg U S Universal Index [Member]
Bloomberg U.S. Intermediate Government/Credit Bond Index (Returns do not reflect deductions for fees, expenses or taxes)
Bloomberg U S Intermediate Government Credit Bond Index [Member]
C000037542 [Member]
iShares Total USD Fixed Income Market ETF
S000097904 [Member]
C000267414 [Member]
Asset Backed and Mortgage Backed Securities Risk [Member]
Cash Management Risk [Member]
Corporate Loans Risk [Member]
Credit Spread Risk [Member]
Fixed to Floating Rate Securities Risk [Member]
Inflation Indexed Bonds Risk [Member]