Investor A C and Institutional [Member] Performance Management - Investor A, C and Institutional - BlackRock Advantage CoreAlpha Bond Fund |
Dec. 31, 2025 |
|---|---|
| Prospectus [Line Items] | |
| Bar Chart and Performance Table [Heading] | Performance Information |
| Performance Narrative [Text Block] | The information shows you how the Fund’s performance has varied year by year and provides some indication of the risks of investing in the Fund. The Fund acquired all of the assets, subject to the liabilities, of BlackRock CoreAlpha Bond Fund (the “Predecessor Fund”), a series of BlackRock Funds III, and the Master Portfolio acquired all of the assets, subject to the liabilities, of CoreAlpha Bond Master Portfolio (the “Predecessor Master Portfolio”), a series of Master Investment Portfolio, in a reorganization on September 17, 2018 (the “Reorganization”). The Fund adopted the performance of the Predecessor Fund as a result of the Reorganization. The performance information below is based on the performance of the Predecessor Fund for periods prior to the date of the Reorganization. The Predecessor Fund had the same investment objectives, strategies and policies, portfolio management team and contractual arrangements, including the same contractual fees and expenses, as the Fund as of the date of the Reorganization. Investor A and Investor C Shares of the Predecessor Fund commenced operations on April 30, 2012. The table compares the Fund’s performance to that of the Bloomberg U.S. Aggregate Bond Index. To the extent that dividends and distributions have been paid by the Fund, the performance information for the Fund in the chart and table assumes reinvestment of the dividends and distributions. As with all such investments, past performance (before and after taxes) is not an indication of future results. Sales charges, if any, are not reflected in the bar chart. If they were, returns would be less than those shown. However, the table includes all applicable fees and sales charges. If BlackRock and its affiliates had not waived or reimbursed certain Master Portfolio and/or Fund expenses during these periods, the Master Portfolio’s/Fund’s returns would have been lower. Updated information on the Fund’s performance, including its current net asset value, can be obtained by visiting www.blackrock.com or can be obtained by phone at (800) 882-0052.
|
| Performance Past Does Not Indicate Future [Text] | As with all such investments, past performance (before and after taxes) is not an indication of future results. |
| Performance Information Illustrates Variability of Returns [Text] | The information shows you how the Fund’s performance has varied year by year and provides some indication of the risks of investing in the Fund. |
| Bar Chart Does Not Reflect Sales Loads [Text] | Sales charges, if any, are not reflected in the bar chart. If they were, returns would be less than those shown. |
| Bar Chart [Heading] | Institutional Shares ANNUAL TOTAL RETURNS BlackRock Advantage CoreAlpha Bond Fund As of 12/31 |
| Bar Chart Closing [Text Block] | During the ten-year period shown in the bar chart, the highest return for a quarter was 6.91% (quarter ended December 31, 2023) and the lowest return for a quarter was -6.41% (quarter ended March 31, 2022).
|
| Performance Table Heading | For the periods ended 12/31/25Average Annual Total Returns |
| Performance Table Narrative | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor’s tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Shares only, and the after-tax returns for Investor A and Investor C Shares will vary.
|
| Performance Table Does Reflect Sales Loads | However, the table includes all applicable fees and sales charges. |
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. |
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on the investor’s tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. |
| Performance Table One Class of after Tax Shown [Text] | After-tax returns are shown for Institutional Shares only, and the after-tax returns for Investor A and Investor C Shares will vary. |
| Performance Availability Website Address [Text] | www.blackrock.com |
| Performance Availability Phone [Text] | (800) 882-0052 |
| Institutional Shares | |
| Prospectus [Line Items] | |
| Highest Quarterly Return, Label [Optional Text] | highest return |
| Highest Quarterly Return | 6.91% |
| Highest Quarterly Return, Date | Dec. 31, 2023 |
| Lowest Quarterly Return, Label [Optional Text] | lowest return |
| Lowest Quarterly Return | (6.41%) |
| Lowest Quarterly Return, Date | Mar. 31, 2022 |