Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| Bloomberg U.S. Aggregate Bond Index (Reflects no deduction for fees, expenses or taxes) | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 7.30% | (0.36%) | 2.01% |
| Bloomberg U.S. MBS Index (Reflects no deduction for fees, expenses or taxes) | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 8.58% | 0.15% | 1.59% |
| iShares Mortgage-Backed Securities Active ETF | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 8.48% | (0.02%) | 1.37% |
| iShares Mortgage-Backed Securities Active ETF | After Taxes on Distributions | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 6.59% | (1.29%) | 0.04% |
| iShares Mortgage-Backed Securities Active ETF | After Taxes on Distributions and Sales | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 5.00% | (0.56%) | 0.47% |