Shareholder Report
|
6 Months Ended |
|
Apr. 30, 2026
USD ($)
Holding
|
| Shareholder Report [Line Items] |
|
|
| Document Type |
N-CSRS
|
|
| Amendment Flag |
false
|
|
| Registrant Name |
iShares Trust
|
|
| Entity Central Index Key |
0001100663
|
|
| Entity Investment Company Type |
N-1A
|
|
| Document Period End Date |
Apr. 30, 2026
|
|
| C000093655 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares 0-5 Year TIPS Bond ETF
|
|
| Trading Symbol |
STIP
|
|
| Security Exchange Name |
NYSEArca
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares 0-5 Year TIPS Bond ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares 0-5 Year TIPS Bond ETF | $2 | 0.03%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 2
|
|
| Expense Ratio, Percent |
0.03%
|
[1] |
| AssetsNet |
$ 15,004,646,632
|
|
| Holdings Count | Holding |
26
|
|
| InvestmentCompanyPortfolioTurnover |
9.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $15,004,646,632 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 26 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9% |
|---|
|
|
| Holdings [Text Block] |
Table SummaryMaturity | Percent of TotaI InvestmentsFootnote Reference(a) |
|---|
0-1 Year........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 19.7% |
|---|
1-2 Years........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 22.2 |
|---|
2-3 Years........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 21.5 |
|---|
3-4 Years........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 18.9 |
|---|
4-5 Years........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 17.7 |
|---|
Table SummarySecurity | Percent of Total InvestmentsFootnote Reference(a) |
|---|
U.S. Treasury Inflation Linked Notes | | 1.13%, 10/15/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.6% | 1.63%, 04/15/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.5 | 1.63%, 10/15/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.4 | 2.13%, 04/15/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.2 | 2.38%, 10/15/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.1 | 1.63%, 10/15/27........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.0 | 0.13%, 04/15/27........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.8 | 1.25%, 04/15/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.8 | 0.13%, 10/15/26........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.8 | 0.13%, 01/15/31........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.7 | | Footnote | Description | Footnote(a) | Excludes money market funds. |
|
|
| C000141927 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares Core Universal USD Bond ETF
|
|
| Trading Symbol |
IUSB
|
|
| Security Exchange Name |
NASDAQ
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares Core Universal USD Bond ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares Core Universal USD Bond ETF | $3 | 0.06%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 3
|
|
| Expense Ratio, Percent |
0.06%
|
[2] |
| AssetsNet |
$ 36,539,062,476
|
|
| Holdings Count | Holding |
17,726
|
|
| InvestmentCompanyPortfolioTurnover |
26.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $36,539,062,476 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 17,726 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 26% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of Total
InvestmentsFootnote Reference(a) |
|---|
Aaa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.6% | Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 55.8 | A........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 12.3 | Baa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 12.3 | Ba........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.2 | B........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.1 | Caa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.8 | Ca........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.1 | C........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.0Footnote Reference(b) | Not Rated........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.8 | Table SummaryInvestment Type | Percent of Total InvestmentsFootnote Reference(a) |
|---|
U.S. Treasury Obligations........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 39.7% | Corporate Bonds........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 31.4 | U.S. Government Sponsored Agency Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 21.3 | Foreign Government Obligations........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.6 | Foreign Agency Obligations........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.6 | Non-Agency Mortgage-Backed Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.6 | Municipal Bonds........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.3 | Asset-Backed Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.3 | Preferred Securities........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.2 | Common Stocks........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.0Footnote Reference(b) | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. | Footnote(b) | Rounds to less than 0.1%. |
|
|
| C000234589 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds 2028 Term High Yield and Income ETF
|
|
| Trading Symbol |
IBHH
|
|
| Security Exchange Name |
CboeBZX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds 2028 Term High Yield and Income ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds 2028 Term High Yield and Income ETF | $17 | 0.35%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 17
|
|
| Expense Ratio, Percent |
0.35%
|
[3] |
| AssetsNet |
$ 437,264,548
|
|
| Holdings Count | Holding |
232
|
|
| InvestmentCompanyPortfolioTurnover |
21.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $437,264,548 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 232 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 21% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Baa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.6% | Ba........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 42.9 | B........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 42.9 | Caa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.9 | Ca........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.0Footnote Reference(a) | Not Rated........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.6 | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.1 | Table SummarySecurityFootnote Reference(b) | Percent of
Net Assets |
|---|
CCO Holdings LLC, 5.00%, 02/01/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.6% | Venture Global LNG, Inc., 8.13%, 06/01/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.5 | DISH DBS Corp., 5.75%, 12/01/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.5 | TransDigm, Inc., 6.75%, 08/15/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.4 | Organon & Co., 4.13%, 04/30/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.3 | Allied Universal Holdco LLC, 4.63%, 06/01/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.3 | Sirius XM Radio LLC, 4.00%, 07/15/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.2 | Tenneco, Inc., 8.00%, 11/17/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.2 | Tenet Healthcare Corp., 6.13%, 10/01/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.1 | Centene Corp., 2.45%, 07/15/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.1 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Rounds to less than 0.1%. | Footnote(b) | Excludes money market funds. |
|
|
| C000234590 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds 2029 Term High Yield and Income ETF
|
|
| Trading Symbol |
IBHI
|
|
| Security Exchange Name |
CboeBZX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds 2029 Term High Yield and Income ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds 2029 Term High Yield and Income ETF | $18 | 0.35%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 18
|
|
| Expense Ratio, Percent |
0.35%
|
[4] |
| AssetsNet |
$ 435,761,749
|
|
| Holdings Count | Holding |
400
|
|
| InvestmentCompanyPortfolioTurnover |
11.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $435,761,749 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 400 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Baa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.6% | Ba........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 34.8 | B........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 43.4 | Caa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 14.8 | Not Rated........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.9 | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.5 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
EchoStar Corp., 10.75%, 11/30/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.0% | Cloud Software Group, Inc., 6.50%, 03/31/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.3 | Cloud Software Group, Inc., 9.00%, 09/30/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.3 | Centene Corp., 4.63%, 12/15/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.3 | Venture Global LNG, Inc., 9.50%, 02/01/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.1 | American Airlines, Inc., 5.75%, 04/20/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.0 | TransDigm, Inc., 6.38%, 03/01/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.0 | Neptune Bidco US, Inc., 9.29%, 04/15/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.9 | Medline Borrower LP, 5.25%, 10/01/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.9 | Staples, Inc., 10.75%, 09/01/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.8 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000243158 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds 2030 Term High Yield and Income ETF
|
|
| Trading Symbol |
IBHJ
|
|
| Security Exchange Name |
CboeBZX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds 2030 Term High Yield and Income ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds 2030 Term High Yield and Income ETF | $18 | 0.35%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 18
|
|
| Expense Ratio, Percent |
0.35%
|
[5] |
| AssetsNet |
$ 136,014,560
|
|
| Holdings Count | Holding |
299
|
|
| InvestmentCompanyPortfolioTurnover |
8.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $136,014,560 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 299 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Baa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.4% | Ba........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 42.0 | B........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 43.2 | Caa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.3 | Not Rated........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.6 | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.5 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
HUB International Ltd., 7.25%, 06/15/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.4% | WULF Compute LLC, 7.75%, 10/15/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.3 | CCO Holdings LLC, 4.75%, 03/01/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.1 | 1011778 BC ULC, 4.00%, 10/15/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.1 | EMRLD Borrower LP, 6.63%, 12/15/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.1 | DaVita, Inc., 4.63%, 06/01/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.1 | Mauser Packaging Solutions Holding Co., 7.88%, 04/15/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.1 | APLD ComputeCo LLC, 9.25%, 12/15/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.0 | CCO Holdings LLC, 4.50%, 08/15/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.0 | DirecTV Financing LLC, 8.88%, 02/01/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.0 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000257911 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds 2032 Term High Yield and Income ETF
|
|
| Trading Symbol |
IBHL
|
|
| Security Exchange Name |
CboeBZX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds 2032 Term High Yield and Income ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds 2032 Term High Yield and Income ETF | $18 | 0.35%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 18
|
|
| Expense Ratio, Percent |
0.35%
|
[6] |
| AssetsNet |
$ 19,054,096
|
|
| Holdings Count | Holding |
208
|
|
| InvestmentCompanyPortfolioTurnover |
5.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $19,054,096 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 208 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Baa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.5% | Ba........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 45.3 | B........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 37.1 | Caa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 13.7 | Not Rated........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.8 | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.6 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
1261229 BC Ltd., 10.00%, 04/15/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.0% | Quikrete Holdings, Inc., 6.38%, 03/01/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.2 | Carnival Corp., 5.75%, 08/01/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.6 | Discovery Global Holdings, Inc., 4.28%, 03/15/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.4 | CCO Holdings LLC, 4.50%, 05/01/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.4 | QXO Building Products, Inc., 6.75%, 04/30/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.2 | TransDigm, Inc., 6.63%, 03/01/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.2 | Venture Global LNG, Inc., 9.88%, 02/01/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.1 | IQVIA, Inc., 6.25%, 06/01/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.1 | Block, Inc., 6.50%, 05/15/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.1 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000236700 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2032 Term Corporate ETF
|
|
| Trading Symbol |
IBDX
|
|
| Security Exchange Name |
NYSEArca
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2032 Term Corporate ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2032 Term Corporate ETF | $5 | 0.10%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 5
|
|
| Expense Ratio, Percent |
0.10%
|
[7] |
| AssetsNet |
$ 1,642,996,970
|
|
| Holdings Count | Holding |
416
|
|
| InvestmentCompanyPortfolioTurnover |
2.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $1,642,996,970 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 416 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aaa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.2% | Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.4 | A........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 35.5 | Baa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 48.5 | Ba........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.2 | Not Rated........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.5 | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.7 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
Verizon Communications, Inc., 2.36%, 03/15/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.2% | Meta Platforms, Inc., 4.60%, 11/15/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.2 | AerCap Ireland Capital DAC, 3.30%, 01/30/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.1 | Meta Platforms, Inc., 3.85%, 08/15/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.9 | Oracle Corp., 4.80%, 09/26/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.9 | Amazon.com, Inc., 3.60%, 04/13/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.7 | Sprint Capital Corp., 8.75%, 03/15/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.7 | Oracle Corp., 6.25%, 11/09/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.7 | Amazon.com, Inc., 4.70%, 12/01/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.7 | Ford Motor Co., 3.25%, 02/12/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.7 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000243159 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2033 Term Corporate ETF
|
|
| Trading Symbol |
IBDY
|
|
| Security Exchange Name |
NYSEArca
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2033 Term Corporate ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2033 Term Corporate ETF | $5 | 0.10%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 5
|
|
| Expense Ratio, Percent |
0.10%
|
[8] |
| AssetsNet |
$ 1,065,284,103
|
|
| Holdings Count | Holding |
381
|
|
| InvestmentCompanyPortfolioTurnover |
6.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $1,065,284,103 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 381 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aaa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.7% | Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.4 | A........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 39.0 | Baa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 48.4 | Ba........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.2 | Not Rated........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.8 | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.5 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
Pfizer Investment Enterprises Pte. Ltd., 4.75%, 05/19/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.6% | Amgen, Inc., 5.25%, 03/02/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.4 | Meta Platforms, Inc., 4.88%, 05/15/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.0 | Amazon.com, Inc., 4.55%, 03/13/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.0 | AT&T, Inc., 2.55%, 12/01/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.0 | Oracle Corp., 5.35%, 05/04/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.9 | Abbott Laboratories, 4.30%, 03/15/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.9 | T-Mobile USA, Inc., 5.05%, 07/15/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.8 | Salesforce, Inc., 5.20%, 03/15/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.8 | Alphabet, Inc., 4.40%, 02/15/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.8 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000257912 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2035 Term Corporate ETF
|
|
| Trading Symbol |
IBCA
|
|
| Security Exchange Name |
NYSEArca
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2035 Term Corporate ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2035 Term Corporate ETF | $5 | 0.10%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 5
|
|
| Expense Ratio, Percent |
0.10%
|
[9] |
| AssetsNet |
$ 336,595,773
|
|
| Holdings Count | Holding |
418
|
|
| InvestmentCompanyPortfolioTurnover |
1.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $336,595,773 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 418 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aaa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.8% | Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.0 | A........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 35.2 | Baa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 47.3 | Ba........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.0 | Not Rated........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.9 | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.8 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
Meta Platforms, Inc., 4.88%, 11/15/35........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.8% | Oracle Corp., 5.20%, 09/26/35........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.1 | Alphabet, Inc., 4.70%, 11/15/35........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.9 | Amazon.com, Inc., 4.65%, 11/20/35........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.9 | Broadcom, Inc., 3.14%, 11/15/35........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.8 | Broadcom, Inc., 5.20%, 07/15/35........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.7 | Synopsys, Inc., 5.15%, 04/01/35........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.7 | AT&T, Inc., 4.50%, 05/15/35........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.7 | AbbVie, Inc., 4.50%, 05/14/35........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.7 | Verizon Communications, Inc., 5.25%, 04/02/35........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.7 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000204676 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2026 Term Muni Bond ETF
|
|
| Trading Symbol |
IBMO
|
|
| Security Exchange Name |
CboeBZX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2026 Term Muni Bond ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2026 Term Muni Bond ETF | $9 | 0.18%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 9
|
|
| Expense Ratio, Percent |
0.18%
|
[10] |
| AssetsNet |
$ 582,383,824
|
|
| Holdings Count | Holding |
1,168
|
|
| InvestmentCompanyPortfolioTurnover |
3.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $582,383,824 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1,168 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryS&P Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
AAA........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 23.4% |
|---|
AA+........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 24.7 |
|---|
AA........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 19.1 |
|---|
AA-........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.0 |
|---|
A+........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.2 |
|---|
A........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.1 |
|---|
A-........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.8 |
|---|
BBB+........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.0Footnote Reference(a) |
|---|
Not Rated........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.1 |
|---|
Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.6 |
|---|
Table SummaryStateFootnote Reference(b) | Percent of
Net Assets |
|---|
New York........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 17.9% | California........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.8 | Texas........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.4 | Pennsylvania........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.5 | Washington........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.5 | Massachusetts........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.4 | Florida........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.2 | Ohio........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.5 | Maryland........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.4 | Virginia........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.4 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by S&P Global Ratings, a widely used independent, nationally recognized statistical rating organization. S&P credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of BBB or higher. Below investment grade ratings are credit ratings of BB or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Rounds to less than 0.1%. | Footnote(b) | Excludes money market funds. |
|
|
| C000210857 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2027 Term Muni Bond ETF
|
|
| Trading Symbol |
IBMP
|
|
| Security Exchange Name |
CboeBZX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2027 Term Muni Bond ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2027 Term Muni Bond ETF | $9 | 0.18%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 9
|
|
| Expense Ratio, Percent |
0.18%
|
[11] |
| AssetsNet |
$ 631,830,088
|
|
| Holdings Count | Holding |
1,645
|
|
| InvestmentCompanyPortfolioTurnover |
3.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $631,830,088 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1,645 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryS&P Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
AAA........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 24.2% |
|---|
AA+........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 19.3 |
|---|
AA........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 14.3 |
|---|
AA-........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 13.2 |
|---|
A+........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.6 |
|---|
A........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.9 |
|---|
A-........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.6 |
|---|
BBB+........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.1 |
|---|
Not Rated........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 13.9 |
|---|
Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.9 |
|---|
Table SummaryStateFootnote Reference(a) | Percent of
Net Assets |
|---|
California........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.9% | Texas........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.7 | New York........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 7.9 | Florida........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.3 | Illinois........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.0 | Washington........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.6 | Pennsylvania........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.2 | Maryland........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.6 | Virginia........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.6 | Ohio........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.5 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by S&P Global Ratings, a widely used independent, nationally recognized statistical rating organization. S&P credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of BBB or higher. Below investment grade ratings are credit ratings of BB or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000210858 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2028 Term Muni Bond ETF
|
|
| Trading Symbol |
IBMQ
|
|
| Security Exchange Name |
CboeBZX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2028 Term Muni Bond ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2028 Term Muni Bond ETF | $9 | 0.18%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 9
|
|
| Expense Ratio, Percent |
0.18%
|
[12] |
| AssetsNet |
$ 635,460,546
|
|
| Holdings Count | Holding |
2,574
|
|
| InvestmentCompanyPortfolioTurnover |
2.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $635,460,546 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2,574 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryS&P Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
AAA........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 23.9% |
|---|
AA+........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 16.1 |
|---|
AA........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 16.3 |
|---|
AA-........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 14.2 |
|---|
A+........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.7 |
|---|
A........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.9 |
|---|
A-........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.2 |
|---|
BBB+........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.1 |
|---|
BBB........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.1 |
|---|
Not Rated........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 13.7 |
|---|
Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.8 |
|---|
Table SummaryStateFootnote Reference(a) | Percent of
Net Assets |
|---|
Texas........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 13.2% | California........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.3 | New York........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 7.8 | Florida........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.4 | Washington........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.1 | Illinois........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.2 | Pennsylvania........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.4 | Ohio........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.8 | Maryland........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.8 | Virginia........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by S&P Global Ratings, a widely used independent, nationally recognized statistical rating organization. S&P credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of BBB or higher. Below investment grade ratings are credit ratings of BB or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000242692 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2029 Term Muni Bond ETF
|
|
| Trading Symbol |
IBMR
|
|
| Security Exchange Name |
CboeBZX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2029 Term Muni Bond ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2029 Term Muni Bond ETF | $9 | 0.18%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 9
|
|
| Expense Ratio, Percent |
0.18%
|
[13] |
| AssetsNet |
$ 441,137,707
|
|
| Holdings Count | Holding |
1,719
|
|
| InvestmentCompanyPortfolioTurnover |
2.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $441,137,707 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1,719 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryS&P Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
AAA........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 24.4% |
|---|
AA+........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 15.3 |
|---|
AA........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 18.9 |
|---|
AA-........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 13.6 |
|---|
A+........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.9 |
|---|
A........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.9 |
|---|
A-........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.1 |
|---|
BBB+........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.1 |
|---|
BBB........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.2 |
|---|
Not Rated........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 14.4 |
|---|
Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.2 |
|---|
Table SummaryStateFootnote Reference(a) | Percent of
Net Assets |
|---|
Texas........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 13.7% | California........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 12.3 | New York........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 7.5 | Illinois........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.3 | Washington........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.8 | Florida........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.5 | Pennsylvania........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.7 | Maryland........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.9 | Ohio........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.8 | Nevada........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.3 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by S&P Global Ratings, a widely used independent, nationally recognized statistical rating organization. S&P credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of BBB or higher. Below investment grade ratings are credit ratings of BB or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000257913 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2031 Term Muni Bond ETF
|
|
| Trading Symbol |
IBMT
|
|
| Security Exchange Name |
CboeBZX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2031 Term Muni Bond ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2031 Term Muni Bond ETF | $9 | 0.18%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 9
|
|
| Expense Ratio, Percent |
0.18%
|
[14] |
| AssetsNet |
$ 87,519,331
|
|
| Holdings Count | Holding |
926
|
|
| InvestmentCompanyPortfolioTurnover |
0.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $87,519,331 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 926 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryS&P Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
AAA........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 24.8% |
|---|
AA+........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 16.0 |
|---|
AA........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 19.2 |
|---|
AA-........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 14.0 |
|---|
A+........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.2 |
|---|
A........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.7 |
|---|
A-........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.4 |
|---|
BBB+........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.1 |
|---|
BBB........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.1 |
|---|
Not Rated........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 12.4 |
|---|
Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.1 |
|---|
Table SummaryStateFootnote Reference(a) | Percent of
Net Assets |
|---|
Texas........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 13.3% | New York........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.7 | California........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.9 | Florida........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.5 | Washington........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.4 | Illinois........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.0 | Maryland........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.6 | Ohio........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.5 | North Carolina........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | Pennsylvania........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by S&P Global Ratings, a widely used independent, nationally recognized statistical rating organization. S&P credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of BBB or higher. Below investment grade ratings are credit ratings of BB or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000217187 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2026 Term Treasury ETF
|
|
| Trading Symbol |
IBTG
|
|
| Security Exchange Name |
NASDAQ
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2026 Term Treasury ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2026 Term Treasury ETF | $3 | 0.07%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 3
|
|
| Expense Ratio, Percent |
0.07%
|
[15] |
| AssetsNet |
$ 2,295,268,076
|
|
| Holdings Count | Holding |
33
|
|
| InvestmentCompanyPortfolioTurnover |
0.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $2,295,268,076 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 33 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aaa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.6% | Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 93.3 | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.1 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Notes | | 4.13%, 10/31/26........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.6% | 4.25%, 11/30/26........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.6 | 3.50%, 09/30/26........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.6 | 3.75%, 08/31/26........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.2 | 4.63%, 06/30/26........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.2 | 4.38%, 07/31/26........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.9 | 4.88%, 05/31/26........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.8 | 1.25%, 11/30/26........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.8 | 1.13%, 10/31/26........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.8 | 1.50%, 08/15/26........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.6 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000217188 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2027 Term Treasury ETF
|
|
| Trading Symbol |
IBTH
|
|
| Security Exchange Name |
NASDAQ
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2027 Term Treasury ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2027 Term Treasury ETF | $3 | 0.07%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 3
|
|
| Expense Ratio, Percent |
0.07%
|
[16] |
| AssetsNet |
$ 2,155,035,153
|
|
| Holdings Count | Holding |
52
|
|
| InvestmentCompanyPortfolioTurnover |
3.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $2,155,035,153 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 52 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 98.9% | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.1 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Notes | | 1.50%, 01/31/27........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.9% | 3.50%, 09/30/27........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | 3.50%, 10/31/27........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | 3.38%, 11/30/27........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | 3.88%, 03/31/27........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | 3.88%, 05/31/27........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | 3.75%, 04/30/27........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | 4.13%, 02/28/27........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | 4.13%, 01/31/27........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | 3.75%, 06/30/27........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000217189 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2028 Term Treasury ETF
|
|
| Trading Symbol |
IBTI
|
|
| Security Exchange Name |
NASDAQ
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2028 Term Treasury ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2028 Term Treasury ETF | $3 | 0.07%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 3
|
|
| Expense Ratio, Percent |
0.07%
|
[17] |
| AssetsNet |
$ 1,678,859,089
|
|
| Holdings Count | Holding |
42
|
|
| InvestmentCompanyPortfolioTurnover |
11.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $1,678,859,089 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 42 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aaa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.4% | Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 90.1 | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.5 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Notes | | 3.50%, 01/31/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.6% | 2.88%, 08/15/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.8 | 2.88%, 05/15/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.8 | 1.13%, 02/29/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | 2.75%, 02/15/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | 3.13%, 11/15/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | 1.25%, 04/30/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | 4.25%, 01/15/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | 4.25%, 02/15/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | 3.88%, 03/15/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000217190 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2029 Term Treasury ETF
|
|
| Trading Symbol |
IBTJ
|
|
| Security Exchange Name |
NASDAQ
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2029 Term Treasury ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2029 Term Treasury ETF | $3 | 0.07%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 3
|
|
| Expense Ratio, Percent |
0.07%
|
[18] |
| AssetsNet |
$ 1,220,568,436
|
|
| Holdings Count | Holding |
33
|
|
| InvestmentCompanyPortfolioTurnover |
7.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $1,220,568,436 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 33 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 7% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 98.3% | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.7 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Notes | | 4.63%, 04/30/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.8% | 3.63%, 08/31/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.7 | 4.13%, 11/30/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.7 | 4.13%, 03/31/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.7 | 4.13%, 10/31/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.6 | 4.25%, 06/30/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.5 | 4.50%, 05/31/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.5 | 4.00%, 07/31/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.5 | 4.25%, 02/28/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.4 | 3.50%, 09/30/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.2 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000220170 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2030 Term Treasury ETF
|
|
| Trading Symbol |
IBTK
|
|
| Security Exchange Name |
NASDAQ
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2030 Term Treasury ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2030 Term Treasury ETF | $3 | 0.07%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 3
|
|
| Expense Ratio, Percent |
0.07%
|
[19] |
| AssetsNet |
$ 860,383,504
|
|
| Holdings Count | Holding |
27
|
|
| InvestmentCompanyPortfolioTurnover |
4.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $860,383,504 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 27 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 98.8% | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.2 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Notes | | 4.00%, 02/28/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 7.0% | 0.88%, 11/15/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.4 | 0.63%, 08/15/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.0 | 4.00%, 05/31/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.7 | 4.00%, 03/31/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.7 | 4.25%, 01/31/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.7 | 3.88%, 07/31/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.7 | 3.88%, 06/30/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.7 | 3.88%, 04/30/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.7 | 0.63%, 05/15/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.7 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000228602 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2031 Term Treasury ETF
|
|
| Trading Symbol |
IBTL
|
|
| Security Exchange Name |
NASDAQ
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2031 Term Treasury ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2031 Term Treasury ETF | $3 | 0.07%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 3
|
|
| Expense Ratio, Percent |
0.07%
|
[20] |
| AssetsNet |
$ 554,673,617
|
|
| Holdings Count | Holding |
21
|
|
| InvestmentCompanyPortfolioTurnover |
20.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $554,673,617 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 21 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 20% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 98.6% | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.4 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Notes | | 1.25%, 08/15/31........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.0% | 1.38%, 11/15/31........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.5 | 1.63%, 05/15/31........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.4 | 1.13%, 02/15/31........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.4 | 3.75%, 01/31/31........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.5 | 4.63%, 04/30/31........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.3 | 4.63%, 05/31/31........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.3 | 4.25%, 06/30/31........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.3 | 4.13%, 10/31/31........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.2 | 4.13%, 11/30/31........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.2 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000236733 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2032 Term Treasury ETF
|
|
| Trading Symbol |
IBTM
|
|
| Security Exchange Name |
NASDAQ
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2032 Term Treasury ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2032 Term Treasury ETF | $3 | 0.07%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 3
|
|
| Expense Ratio, Percent |
0.07%
|
[21] |
| AssetsNet |
$ 534,131,515
|
|
| Holdings Count | Holding |
16
|
|
| InvestmentCompanyPortfolioTurnover |
5.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $534,131,515 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 16 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 98.7% | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.3 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Notes | | 4.13%, 11/15/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.4% | 2.88%, 05/15/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.9 | 1.88%, 02/15/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.7 | 2.75%, 08/15/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.3 | 4.38%, 01/31/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.1 | 4.13%, 02/29/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.1 | 4.13%, 03/31/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.1 | 4.13%, 05/31/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.1 | 4.00%, 04/30/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.0 | 4.00%, 07/31/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.0 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000243160 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2033 Term Treasury ETF
|
|
| Trading Symbol |
IBTO
|
|
| Security Exchange Name |
NASDAQ
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2033 Term Treasury ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2033 Term Treasury ETF | $3 | 0.07%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 3
|
|
| Expense Ratio, Percent |
0.07%
|
[22] |
| AssetsNet |
$ 453,654,940
|
|
| Holdings Count | Holding |
8
|
|
| InvestmentCompanyPortfolioTurnover |
24.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $453,654,940 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 24% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 98.4% | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.6 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Notes, 4.50%, 11/15/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 21.4% | U.S. Treasury Notes, 3.88%, 08/15/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 19.4 | U.S. Treasury Notes, 3.50%, 02/15/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 17.8 | U.S. Treasury Notes, 3.38%, 05/15/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 17.6 | U.S. Treasury Notes, 4.25%, 03/31/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 7.6 | U.S. Treasury Notes, 4.00%, 01/31/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 7.5 | U.S. Treasury Notes, 3.75%, 02/28/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 7.1 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000257914 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2035 Term Treasury ETF
|
|
| Trading Symbol |
IBTQ
|
|
| Security Exchange Name |
NASDAQ
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2035 Term Treasury ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2035 Term Treasury ETF | $3 | 0.07%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 3
|
|
| Expense Ratio, Percent |
0.07%
|
[23] |
| AssetsNet |
$ 220,073,717
|
|
| Holdings Count | Holding |
5
|
|
| InvestmentCompanyPortfolioTurnover |
19.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $220,073,717 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 19% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 98.4% | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.6 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Notes, 4.63%, 02/15/35........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 25.4% | U.S. Treasury Notes, 4.25%, 05/15/35........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 25.0 | U.S. Treasury Notes, 4.00%, 11/15/35........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 24.0 | U.S. Treasury Notes, 4.25%, 08/15/35........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 24.0 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000257915 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2045 Term Treasury ETF
|
|
| Trading Symbol |
IBGB
|
|
| Security Exchange Name |
NASDAQ
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2045 Term Treasury ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2045 Term Treasury ETF | $3 | 0.07%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 3
|
|
| Expense Ratio, Percent |
0.07%
|
[24] |
| AssetsNet |
$ 8,476,183
|
|
| Holdings Count | Holding |
9
|
|
| InvestmentCompanyPortfolioTurnover |
14.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $8,476,183 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 14% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 98.1% | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.9 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Bonds, 5.00%, 05/15/45........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 15.2% | U.S. Treasury Bonds, 4.88%, 08/15/45........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 14.6 | U.S. Treasury Bonds, 4.63%, 11/15/45........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 14.4 | U.S. Treasury Bonds, 4.75%, 02/15/45........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 14.3 | U.S. Treasury Bonds, 3.00%, 11/15/45........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.2 | U.S. Treasury Bonds, 3.00%, 05/15/45........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.2 | U.S. Treasury Bonds, 2.88%, 08/15/45........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.7 | U.S. Treasury Bonds, 2.50%, 02/15/45........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.5 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000257916 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2055 Term Treasury ETF
|
|
| Trading Symbol |
IBGL
|
|
| Security Exchange Name |
NASDAQ
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2055 Term Treasury ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2055 Term Treasury ETF | $3 | 0.07%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 3
|
|
| Expense Ratio, Percent |
0.07%
|
[25] |
| AssetsNet |
$ 5,953,072
|
|
| Holdings Count | Holding |
5
|
|
| InvestmentCompanyPortfolioTurnover |
24.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $5,953,072 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 24% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 98.0% | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.0 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Bonds, 4.75%, 05/15/55........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 25.1% | U.S. Treasury Bonds, 4.63%, 02/15/55........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 24.4 | U.S. Treasury Bonds, 4.75%, 08/15/55........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 24.3 | U.S. Treasury Bonds, 4.63%, 11/15/55........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 24.2 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000243458 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Oct 2026 Term TIPS ETF
|
|
| Trading Symbol |
IBIC
|
|
| Security Exchange Name |
NYSEArca
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Oct 2026 Term TIPS ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Oct 2026 Term TIPS ETF | $5 | 0.09%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 5
|
|
| Expense Ratio, Percent |
0.09%
|
[26] |
| AssetsNet |
$ 80,516,263
|
|
| Holdings Count | Holding |
3
|
|
| InvestmentCompanyPortfolioTurnover |
0.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $80,516,263 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 99.9% | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.1 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Inflation Linked Notes, 0.13%, 10/15/26........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 52.9% | U.S. Treasury Inflation Linked Notes, 0.13%, 07/15/26........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 47.0 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000243459 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Oct 2027 Term TIPS ETF
|
|
| Trading Symbol |
IBID
|
|
| Security Exchange Name |
NYSEArca
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Oct 2027 Term TIPS ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Oct 2027 Term TIPS ETF | $5 | 0.10%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 5
|
|
| Expense Ratio, Percent |
0.10%
|
[27] |
| AssetsNet |
$ 96,904,280
|
|
| Holdings Count | Holding |
6
|
|
| InvestmentCompanyPortfolioTurnover |
0.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $96,904,280 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 99.7% | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.3 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Inflation Linked Notes, 1.63%, 10/15/27........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 24.8% | U.S. Treasury Inflation Linked Notes, 0.13%, 04/15/27........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 24.3 | U.S. Treasury Inflation Linked Notes, 0.38%, 07/15/27........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 21.5 | U.S. Treasury Inflation Linked Notes, 0.38%, 01/15/27........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 19.2 | U.S. Treasury Inflation Linked Bonds, 2.38%, 01/15/27........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.9 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000243460 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Oct 2028 Term TIPS ETF
|
|
| Trading Symbol |
IBIE
|
|
| Security Exchange Name |
NYSEArca
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Oct 2028 Term TIPS ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Oct 2028 Term TIPS ETF | $5 | 0.10%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 5
|
|
| Expense Ratio, Percent |
0.10%
|
[28] |
| AssetsNet |
$ 146,300,596
|
|
| Holdings Count | Holding |
7
|
|
| InvestmentCompanyPortfolioTurnover |
1.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $146,300,596 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 7 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aaa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 17.3% | Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 82.3 | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.4 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Inflation Linked Notes, 2.38%, 10/15/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 23.4% | U.S. Treasury Inflation Linked Notes, 1.25%, 04/15/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 22.0 | U.S. Treasury Inflation Linked Notes, 0.50%, 01/15/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 19.7 | U.S. Treasury Inflation Linked Notes, 0.75%, 07/15/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 17.3 | U.S. Treasury Inflation Linked Bonds, 3.63%, 04/15/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.8 | U.S. Treasury Inflation Linked Bonds, 1.75%, 01/15/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.4 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000243461 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Oct 2029 Term TIPS ETF
|
|
| Trading Symbol |
IBIF
|
|
| Security Exchange Name |
NYSEArca
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Oct 2029 Term TIPS ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Oct 2029 Term TIPS ETF | $5 | 0.10%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 5
|
|
| Expense Ratio, Percent |
0.10%
|
[29] |
| AssetsNet |
$ 96,445,158
|
|
| Holdings Count | Holding |
7
|
|
| InvestmentCompanyPortfolioTurnover |
1.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $96,445,158 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 7 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 99.8% | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.2 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Inflation Linked Notes, 1.63%, 10/15/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 24.8% | U.S. Treasury Inflation Linked Notes, 2.13%, 04/15/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 23.8 | U.S. Treasury Inflation Linked Notes, 0.25%, 07/15/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 17.5 | U.S. Treasury Inflation Linked Notes, 0.88%, 01/15/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 15.1 | U.S. Treasury Inflation Linked Bonds, 3.88%, 04/15/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.5 | U.S. Treasury Inflation Linked Bonds, 2.50%, 01/15/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.0 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000243462 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Oct 2030 Term TIPS ETF
|
|
| Trading Symbol |
IBIG
|
|
| Security Exchange Name |
NYSEArca
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Oct 2030 Term TIPS ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Oct 2030 Term TIPS ETF | $5 | 0.10%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 5
|
|
| Expense Ratio, Percent |
0.10%
|
[30] |
| AssetsNet |
$ 124,321,684
|
|
| Holdings Count | Holding |
5
|
|
| InvestmentCompanyPortfolioTurnover |
10.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $124,321,684 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 99.9% | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.1 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Inflation Linked Notes, 1.13%, 10/15/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 27.9% | U.S. Treasury Inflation Linked Notes, 1.63%, 04/15/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 27.7 | U.S. Treasury Inflation Linked Notes, 0.13%, 07/15/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 23.1 | U.S. Treasury Inflation Linked Notes, 0.13%, 01/15/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 21.2 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000243463 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Oct 2031 Term TIPS ETF
|
|
| Trading Symbol |
IBIH
|
|
| Security Exchange Name |
NYSEArca
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Oct 2031 Term TIPS ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Oct 2031 Term TIPS ETF | $5 | 0.10%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 5
|
|
| Expense Ratio, Percent |
0.10%
|
[31] |
| AssetsNet |
$ 51,536,744
|
|
| Holdings Count | Holding |
4
|
|
| InvestmentCompanyPortfolioTurnover |
28.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $51,536,744 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 28% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 99.9% | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.1 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Inflation Linked Notes, 0.13%, 07/15/31........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 39.5% | U.S. Treasury Inflation Linked Notes, 0.13%, 01/15/31........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 39.2 | U.S. Treasury Inflation Linked Notes, 1.25%, 04/15/31........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 21.2 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000243464 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Oct 2032 Term TIPS ETF
|
|
| Trading Symbol |
IBII
|
|
| Security Exchange Name |
NYSEArca
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Oct 2032 Term TIPS ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Oct 2032 Term TIPS ETF | $5 | 0.10%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 5
|
|
| Expense Ratio, Percent |
0.10%
|
[32] |
| AssetsNet |
$ 39,221,460
|
|
| Holdings Count | Holding |
4
|
|
| InvestmentCompanyPortfolioTurnover |
0.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $39,221,460 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 99.8% | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.2 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Inflation Linked Notes, 0.63%, 07/15/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 47.5% | U.S. Treasury Inflation Linked Notes, 0.13%, 01/15/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 44.7 | U.S. Treasury Inflation Linked Bonds, 3.38%, 04/15/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 7.6 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000243456 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Oct 2033 Term TIPS ETF
|
|
| Trading Symbol |
IBIJ
|
|
| Security Exchange Name |
NYSEArca
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Oct 2033 Term TIPS ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Oct 2033 Term TIPS ETF | $5 | 0.10%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 5
|
|
| Expense Ratio, Percent |
0.10%
|
[33] |
| AssetsNet |
$ 49,835,555
|
|
| Holdings Count | Holding |
3
|
|
| InvestmentCompanyPortfolioTurnover |
1.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $49,835,555 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 99.6% | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.4 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Inflation Linked Notes, 1.13%, 01/15/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 50.0% | U.S. Treasury Inflation Linked Notes, 1.38%, 07/15/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 49.6 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000257917 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Oct 2035 Term TIPS ETF
|
|
| Trading Symbol |
IBIL
|
|
| Security Exchange Name |
NYSEArca
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Oct 2035 Term TIPS ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Oct 2035 Term TIPS ETF | $5 | 0.10%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 5
|
|
| Expense Ratio, Percent |
0.10%
|
[34] |
| AssetsNet |
$ 36,002,290
|
|
| Holdings Count | Holding |
3
|
|
| InvestmentCompanyPortfolioTurnover |
9.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $36,002,290 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 99.4% | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.6 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Inflation Linked Notes, 1.88%, 07/15/35........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 50.7% | U.S. Treasury Inflation Linked Notes, 2.13%, 01/15/35........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 48.7 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000012093 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares TIPS Bond ETF
|
|
| Trading Symbol |
TIP
|
|
| Security Exchange Name |
NYSEArca
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares TIPS Bond ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares TIPS Bond ETF | $9 | 0.18%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 9
|
|
| Expense Ratio, Percent |
0.18%
|
[35] |
| AssetsNet |
$ 14,952,210,172
|
|
| Holdings Count | Holding |
49
|
|
| InvestmentCompanyPortfolioTurnover |
11.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $14,952,210,172 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 49 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11% |
|---|
|
|
| Holdings [Text Block] |
Table SummaryMaturity | Percent of TotaI InvestmentsFootnote Reference(a) |
|---|
1-5 Years........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 50.2% |
|---|
5-10 Years........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 35.5 |
|---|
10-15 Years........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.5 |
|---|
15-20 Years........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.3 |
|---|
20-25 Years........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.1 |
|---|
25-30 Years........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.4 |
|---|
Table SummarySecurity | Percent of Total InvestmentsFootnote Reference(a) |
|---|
U.S. Treasury Inflation Linked Notes | | 1.88%, 07/15/35........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.1% | 2.13%, 01/15/35........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.1 | 1.88%, 07/15/34........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.8 | 1.75%, 01/15/34........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.7 | 1.13%, 10/15/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.5 | 1.63%, 04/15/30........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.5 | 1.13%, 01/15/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.4 | 1.38%, 07/15/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.4 | 0.63%, 07/15/32........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.4 | 1.63%, 10/15/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.3 | | Footnote | Description | Footnote(a) | Excludes money market funds. |
|
|
| C000110086 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares U.S. Treasury Bond ETF
|
|
| Trading Symbol |
GOVT
|
|
| Security Exchange Name |
CboeBZX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares U.S. Treasury Bond ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares U.S. Treasury Bond ETF | $2 | 0.05%Footnote Reference(a) |
|---|
| Footnote | Description | Footnote(a) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 2
|
|
| Expense Ratio, Percent |
0.05%
|
[36] |
| AssetsNet |
$ 41,045,687,371
|
|
| Holdings Count | Holding |
219
|
|
| InvestmentCompanyPortfolioTurnover |
9.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $41,045,687,371 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 219 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9% |
|---|
|
|
| Holdings [Text Block] |
Table SummaryMaturity | Percent of TotaI InvestmentsFootnote Reference(a) |
|---|
0-1 Years........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.4% |
|---|
1-5 Years........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 56.1 |
|---|
5-10 Years........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 22.5 |
|---|
10-15 Years........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.4 |
|---|
15-20 Years........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.0 |
|---|
More than 20 Years........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 12.6 |
|---|
Table SummarySecurity | Percent of Total InvestmentsFootnote Reference(a) |
|---|
U.S. Treasury Notes, 1.38%, 11/15/31........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.3% | U.S. Treasury Notes, 2.63%, 02/15/29........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.0 | U.S. Treasury Notes, 2.75%, 02/15/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.6 | U.S. Treasury Notes, 3.13%, 11/15/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.1 | U.S. Treasury Notes, 2.88%, 05/15/28........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.6 | U.S. Treasury Bonds, 1.88%, 02/15/51........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.6 | U.S. Treasury Bonds, 2.50%, 05/15/46........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.5 | U.S. Treasury Bonds, 2.75%, 11/15/42........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.5 | U.S. Treasury Bonds, 3.75%, 11/15/43........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.4 | U.S. Treasury Bonds, 6.13%, 11/15/27........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.4 | | Footnote | Description | Footnote(a) | Excludes money market funds. |
|
|
| C000138243 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares Yield Optimized Bond ETF
|
|
| Trading Symbol |
BYLD
|
|
| Security Exchange Name |
NYSEArca
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares Yield Optimized Bond ETF (the “Fund”) for the period of November 1, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares Yield Optimized Bond ETF | $0Footnote Reference(a) | 0.00%Footnote Reference(a)Footnote Reference(b) |
|---|
| Footnote | Description | Footnote(a) | Excludes fees and expenses incurred indirectly as a result of investments in underlying funds. | Footnote(b) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 0
|
[37] |
| Expense Ratio, Percent |
0.00%
|
[37],[38] |
| AssetsNet |
$ 389,278,492
|
|
| Holdings Count | Holding |
13
|
|
| InvestmentCompanyPortfolioTurnover |
13.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $389,278,492 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 13 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 13% |
|---|
|
|
| Holdings [Text Block] |
Table SummaryInvestment Type | Percent of Total InvestmentsFootnote Reference(a) |
|---|
Investment Companies........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 100.0% | Table SummarySecurity | Percent of Total InvestmentsFootnote Reference(a) |
|---|
iShares Broad USD High Yield Corporate Bond ETF........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 20.1% | iShares 10+ Year Investment Grade Corporate Bond ETF........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.3 | iShares Floating Rate Bond ETF........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.2 | iShares J.P. Morgan Emerging Markets High Yield Bond ETF........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.0 | iShares Broad USD Investment Grade Corporate Bond ETF........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.0 | iShares 5-10 Year Investment Grade Corporate Bond ETF........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.6 | iShares Investment Grade Systematic Bond ETF........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.7 | iShares GNMA Bond ETF........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.0 | iShares 0-3 Month Treasury Bond ETF........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.6 | iShares Core Universal USD Bond ETF........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.5 | | Footnote | Description | Footnote(a) | Excludes money market funds. |
|
|
| S000101596 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2032 Term Muni Bond ETF
|
|
| Trading Symbol |
IBMU
|
|
| Security Exchange Name |
CboeBZX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2032 Term Muni Bond ETF (the “Fund”) for the period of March 25, 2026 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the period?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2032 Term Muni Bond ETF | $2Footnote Reference(a) | 0.18%Footnote Reference(b) |
|---|
| Footnote | Description | Footnote(a) | The Fund commenced operations during the reporting period. Expenses for a full reporting period would be higher than the amount shown. | Footnote(b) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 2
|
[39] |
| Expense Ratio, Percent |
0.18%
|
[40] |
| AssetsNet |
$ 5,061,347
|
|
| Holdings Count | Holding |
167
|
|
| InvestmentCompanyPortfolioTurnover |
0.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $5,061,347 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 167 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryS&P Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
AAA........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 21.9% |
|---|
AA+........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 14.5 |
|---|
AA........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 22.1 |
|---|
AA-........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.5 |
|---|
A+........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.8 |
|---|
A........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.3 |
|---|
A-........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 |
|---|
Not Rated........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 18.8 |
|---|
Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.4 |
|---|
Table SummaryStateFootnote Reference(a) | Percent of
Net Assets |
|---|
Texas........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 15.4% | California........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 12.8 | New York........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.4 | Washington........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.9 | Illinois........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.7 | Florida........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.3 | Ohio........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.6 | Pennsylvania........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.2 | Arizona........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.1 | Maryland........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by S&P Global Ratings, a widely used independent, nationally recognized statistical rating organization. S&P credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of BBB or higher. Below investment grade ratings are credit ratings of BB or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| S000101597 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2033 Term Muni Bond ETF
|
|
| Trading Symbol |
IBMV
|
|
| Security Exchange Name |
CboeBZX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2033 Term Muni Bond ETF (the “Fund”) for the period of March 25, 2026 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the period?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2033 Term Muni Bond ETF | $2Footnote Reference(a) | 0.18%Footnote Reference(b) |
|---|
| Footnote | Description | Footnote(a) | The Fund commenced operations during the reporting period. Expenses for a full reporting period would be higher than the amount shown. | Footnote(b) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 2
|
[41] |
| Expense Ratio, Percent |
0.18%
|
[42] |
| AssetsNet |
$ 3,801,529
|
|
| Holdings Count | Holding |
131
|
|
| InvestmentCompanyPortfolioTurnover |
0.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $3,801,529 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 131 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryS&P Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
AAA........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 23.6% |
|---|
AA+........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 18.3 |
|---|
AA........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 22.4 |
|---|
AA-........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 8.4 |
|---|
A+........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.8 |
|---|
A........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.3 |
|---|
A-........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.5 |
|---|
Not Rated........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 13.3 |
|---|
Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.4 |
|---|
Table SummaryStateFootnote Reference(a) | Percent of
Net Assets |
|---|
California........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 14.5% | Texas........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 13.1 | New York........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 12.5 | Florida........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.3 | Washington........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.0 | Pennsylvania........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.7 | Ohio........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.4 | Illinois........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | Arizona........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.4 | Maryland........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.4 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by S&P Global Ratings, a widely used independent, nationally recognized statistical rating organization. S&P credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of BBB or higher. Below investment grade ratings are credit ratings of BB or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000271807 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2034 Term Muni Bond ETF
|
|
| Trading Symbol |
IBMW
|
|
| Security Exchange Name |
CboeBZX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2034 Term Muni Bond ETF (the “Fund”) for the period of April 7, 2026 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the period?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2034 Term Muni Bond ETF | $1Footnote Reference(a) | 0.18%Footnote Reference(b) |
|---|
| Footnote | Description | Footnote(a) | The Fund commenced operations during the reporting period. Expenses for a full reporting period would be higher than the amount shown. | Footnote(b) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 1
|
[43] |
| Expense Ratio, Percent |
0.18%
|
[44] |
| AssetsNet |
$ 3,782,498
|
|
| Holdings Count | Holding |
124
|
|
| InvestmentCompanyPortfolioTurnover |
0.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $3,782,498 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 124 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryS&P Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
AAA........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 25.2% |
|---|
AA+........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 14.6 |
|---|
AA........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 22.2 |
|---|
AA-........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 9.1 |
|---|
A+........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.8 |
|---|
A........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 7.9 |
|---|
A-........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.4 |
|---|
Not Rated........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 13.3 |
|---|
Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.5 |
|---|
Table SummaryStateFootnote Reference(a) | Percent of
Net Assets |
|---|
Texas........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 15.9% | California........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 12.7 | New York........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.0 | Washington........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.5 | Florida........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.4 | Illinois........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.2 | Tennessee........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.4 | Arizona........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.0 | Minnesota........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.9 | Pennsylvania........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.8 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by S&P Global Ratings, a widely used independent, nationally recognized statistical rating organization. S&P credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of BBB or higher. Below investment grade ratings are credit ratings of BB or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000271808 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2035 Term Muni Bond ETF
|
|
| Trading Symbol |
IBMX
|
|
| Security Exchange Name |
CboeBZX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2035 Term Muni Bond ETF (the “Fund”) for the period of April 14, 2026 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the period?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2035 Term Muni Bond ETF | $1Footnote Reference(a) | 0.18%Footnote Reference(b) |
|---|
| Footnote | Description | Footnote(a) | The Fund commenced operations during the reporting period. Expenses for a full reporting period would be higher than the amount shown. | Footnote(b) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 1
|
[45] |
| Expense Ratio, Percent |
0.18%
|
[46] |
| AssetsNet |
$ 5,002,842
|
|
| Holdings Count | Holding |
140
|
|
| InvestmentCompanyPortfolioTurnover |
0.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $5,002,842 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 140 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryS&P Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
AAA........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 27.6% |
|---|
AA+........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 13.6 |
|---|
AA........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 17.7 |
|---|
AA-........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 15.2 |
|---|
A+........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6.0 |
|---|
A........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.0 |
|---|
A-........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.4 |
|---|
Not Rated........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 12.4 |
|---|
Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.1 |
|---|
Table SummaryStateFootnote Reference(a) | Percent of
Net Assets |
|---|
California........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 18.3% | Texas........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 17.3 | New York........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 11.4 | Washington........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.3 | Ohio........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 4.8 | Florida........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.5 | Maryland........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.0 | Illinois........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.7 | Massachusetts........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.3 | Oklahoma........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.2 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by S&P Global Ratings, a widely used independent, nationally recognized statistical rating organization. S&P credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of BBB or higher. Below investment grade ratings are credit ratings of BB or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| C000265972 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares 0-1 Year TIPS Bond ETF
|
|
| Trading Symbol |
ICPI
|
|
| Security Exchange Name |
NYSEArca
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares 0-1 Year TIPS Bond ETF (the “Fund”) for the period of November 19, 2025 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the period?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares 0-1 Year TIPS Bond ETF | $4Footnote Reference(a) | 0.09%Footnote Reference(b) |
|---|
| Footnote | Description | Footnote(a) | The Fund commenced operations during the reporting period. Expenses for a full reporting period would be higher than the amount shown. | Footnote(b) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 4
|
[47] |
| Expense Ratio, Percent |
0.09%
|
[48] |
| AssetsNet |
$ 8,143,920
|
|
| Holdings Count | Holding |
6
|
|
| InvestmentCompanyPortfolioTurnover |
0.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $8,143,920 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0% |
|---|
|
|
| Holdings [Text Block] |
Table SummaryMaturity | Percent of TotaI InvestmentsFootnote Reference(a) |
|---|
0-1 Year........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 100.0% |
|---|
Table SummarySecurity | Percent of Total
InvestmentsFootnote Reference(a) |
|---|
U.S. Treasury Inflation Linked Notes, 0.13%, 04/15/27........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 24.5% | U.S. Treasury Inflation Linked Notes, 0.13%, 10/15/26........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 24.4 | U.S. Treasury Inflation Linked Notes, 0.13%, 07/15/26........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 21.7 | U.S. Treasury Inflation Linked Notes, 0.38%, 01/15/27........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 19.4 | U.S. Treasury Inflation Linked Bonds, 2.38%, 01/15/27........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.0 | | Footnote | Description | Footnote(a) | Excludes money market funds. |
|
|
| S000101601 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2036 Term Treasury ETF
|
|
| Trading Symbol |
IBTR
|
|
| Security Exchange Name |
NASDAQ
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2036 Term Treasury ETF (the “Fund”) for the period of March 25, 2026 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the period?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2036 Term Treasury ETF | $1Footnote Reference(a) | 0.07%Footnote Reference(b) |
|---|
| Footnote | Description | Footnote(a) | The Fund commenced operations during the reporting period. Expenses for a full reporting period would be higher than the amount shown. | Footnote(b) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 1
|
[49] |
| Expense Ratio, Percent |
0.07%
|
[50] |
| AssetsNet |
$ 3,743,711
|
|
| Holdings Count | Holding |
3
|
|
| InvestmentCompanyPortfolioTurnover |
22.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $3,743,711 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 22% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 98.7% | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.3 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Notes, 4.13%, 02/15/36........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 82.4% | U.S. Treasury Bonds, 4.50%, 02/15/36........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 16.3 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| S000101602 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2046 Term Treasury ETF
|
|
| Trading Symbol |
IBGC
|
|
| Security Exchange Name |
NASDAQ
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2046 Term Treasury ETF (the “Fund”) for the period of March 25, 2026 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the period?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2046 Term Treasury ETF | $1Footnote Reference(a) | 0.07%Footnote Reference(b) |
|---|
| Footnote | Description | Footnote(a) | The Fund commenced operations during the reporting period. Expenses for a full reporting period would be higher than the amount shown. | Footnote(b) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 1
|
[51] |
| Expense Ratio, Percent |
0.07%
|
[52] |
| AssetsNet |
$ 3,727,185
|
|
| Holdings Count | Holding |
6
|
|
| InvestmentCompanyPortfolioTurnover |
21.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $3,727,185 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 6 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 21% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 98.3% | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.7 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Bonds, 4.63%, 02/15/46........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 27.4% | U.S. Treasury Bonds, 2.88%, 11/15/46........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 19.2 | U.S. Treasury Bonds, 2.50%, 05/15/46........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 18.1 | U.S. Treasury Bonds, 2.50%, 02/15/46........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 17.1 | U.S. Treasury Bonds, 2.25%, 08/15/46........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 16.5 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| S000101603 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2056 Term Treasury ETF
|
|
| Trading Symbol |
IBGM
|
|
| Security Exchange Name |
NASDAQ
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2056 Term Treasury ETF (the “Fund”) for the period of March 25, 2026 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the period?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2056 Term Treasury ETF | $1Footnote Reference(a) | 0.07%Footnote Reference(b) |
|---|
| Footnote | Description | Footnote(a) | The Fund commenced operations during the reporting period. Expenses for a full reporting period would be higher than the amount shown. | Footnote(b) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 1
|
[53] |
| Expense Ratio, Percent |
0.07%
|
[54] |
| AssetsNet |
$ 3,711,375
|
|
| Holdings Count | Holding |
2
|
|
| InvestmentCompanyPortfolioTurnover |
1.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $3,711,375 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 98.6% | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.4 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Bonds, 4.75%, 02/15/56........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 98.6% | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| S000101595 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds 2033 Term High Yield and Income ETF
|
|
| Trading Symbol |
IBHM
|
|
| Security Exchange Name |
CboeBZX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds 2033 Term High Yield and Income ETF (the “Fund”) for the period of March 25, 2026 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the period?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds 2033 Term High Yield and Income ETF | $3Footnote Reference(a) | 0.35%Footnote Reference(b) |
|---|
| Footnote | Description | Footnote(a) | The Fund commenced operations during the reporting period. Expenses for a full reporting period would be higher than the amount shown. | Footnote(b) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 3
|
[55] |
| Expense Ratio, Percent |
0.35%
|
[56] |
| AssetsNet |
$ 11,442,855
|
|
| Holdings Count | Holding |
157
|
|
| InvestmentCompanyPortfolioTurnover |
3.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $11,442,855 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 157 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Baa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.7% | Ba........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 54.0 | B........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 36.9 | Caa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 5.0 | Not Rated........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.4 | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.0 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
Nexstar Media, Inc., 6.50%, 09/15/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.4% | OAK-Eagle Acquireco, Inc., 7.25%, 07/01/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.3 | TransDigm, Inc., 6.38%, 05/31/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.9 | Beach Acquisition Bidco LLC, 10.00%, 07/15/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.8 | Level 3 Financing, Inc., 6.88%, 06/30/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.5 | Jane Street Group, 6.75%, 05/01/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.5 | Carnival Corp., 6.13%, 02/15/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.5 | Rocket Cos., Inc., 6.38%, 08/01/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.5 | Michaels Cos., Inc. (The), 8.50%, 03/15/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.4 | CCO Holdings LLC, 7.00%, 02/01/33........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.2 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| S000101604 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Oct 2036 Term TIPS ETF
|
|
| Trading Symbol |
IBIM
|
|
| Security Exchange Name |
NYSEArca
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Oct 2036 Term TIPS ETF (the “Fund”) for the period of March 25, 2026 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the period?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Oct 2036 Term TIPS ETF | $1Footnote Reference(a) | 0.10%Footnote Reference(b) |
|---|
| Footnote | Description | Footnote(a) | The Fund commenced operations during the reporting period. Expenses for a full reporting period would be higher than the amount shown. | Footnote(b) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 1
|
[57] |
| Expense Ratio, Percent |
0.10%
|
[58] |
| AssetsNet |
$ 6,347,072
|
|
| Holdings Count | Holding |
2
|
|
| InvestmentCompanyPortfolioTurnover |
0.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $6,347,072 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 99.5% | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0.5 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
U.S. Treasury Inflation Linked Notes, 1.88%, 01/15/36........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 99.5% | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
| S000101600 |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
iShares iBonds Dec 2036 Term Corporate ETF
|
|
| Trading Symbol |
IBCB
|
|
| Security Exchange Name |
NYSEArca
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about iShares iBonds Dec 2036 Term Corporate ETF (the “Fund”) for the period of March 25, 2026 to April 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
Semi-Annual Shareholder Report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at blackrock.com/fundreports. You can also request this information by contacting us at 1-800-iShares (1-800-474-2737).
|
|
| Additional Information Phone Number |
1-800-iShares (1-800-474-2737)
|
|
| Additional Information Website |
blackrock.com/fundreports
|
|
| Expenses [Text Block] |
What were the Fund costs for the period?(based on a hypothetical $10,000 investment) Table SummaryFund name | Costs of a $10,000 investment | Costs paid as a percentage of a $10,000 investment |
|---|
iShares iBonds Dec 2036 Term Corporate ETF | $1Footnote Reference(a) | 0.10%Footnote Reference(b) |
|---|
| Footnote | Description | Footnote(a) | The Fund commenced operations during the reporting period. Expenses for a full reporting period would be higher than the amount shown. | Footnote(b) | Annualized. |
|
|
| Expenses Paid, Amount |
$ 1
|
[59] |
| Expense Ratio, Percent |
0.10%
|
[60] |
| AssetsNet |
$ 33,870,078
|
|
| Holdings Count | Holding |
215
|
|
| InvestmentCompanyPortfolioTurnover |
0.00%
|
|
| Additional Fund Statistics [Text Block] |
Table SummaryNet Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | $33,870,078 |
|---|
Number of Portfolio Holdings........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 215 |
|---|
Portfolio Turnover Rate........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 0% |
|---|
|
|
| Holdings [Text Block] |
Credit quality allocationTable SummaryMoody's Credit RatingFootnote Reference* | Percent of
Net Assets |
|---|
Aaa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.9% | Aa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 10.4 | A........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 38.9 | Baa........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 44.4 | Ba........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.4 | Not Rated........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.5 | Short-Term and Other Assets........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.5 | Table SummarySecurityFootnote Reference(a) | Percent of
Net Assets |
|---|
Amazon.com, Inc., 4.88%, 03/13/36........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 3.0% | Anheuser-Busch Cos. LLC, 4.70%, 02/01/36........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.6 | Oracle Corp., 5.70%, 02/04/36........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.4 | Salesforce, Inc., 5.55%, 03/15/36........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.3 | Alphabet, Inc., 4.80%, 02/15/36........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 2.1 | Abbott Laboratories, 4.65%, 03/15/36........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.7 | Honeywell Aerospace, Inc., 4.95%, 03/16/36........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.6 | Broadcom, Inc., 3.19%, 11/15/36........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.2 | Novartis Capital Corp., 4.90%, 03/18/36........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.2 | Verizon Communications, Inc., 5.00%, 01/15/36........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ | 1.1 | | Footnote | Description | Footnote* | Credit quality ratings shown reflect the ratings assigned by Moody’s Investors Service (“Moody’s”), a widely used independent, nationally recognized statistical rating organization. Moody’s credit ratings are opinions of the credit quality of individual obligations or of an issuer’s general creditworthiness. Investment grade ratings are credit ratings of Baa or higher. Below investment grade ratings are credit ratings of Ba or lower. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.
| Footnote(a) | Excludes money market funds. |
|
|
|
|