Performance Management - Prospectus Summary |
Oct. 31, 2025 |
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| U.S. Large Cap Equity Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Large Cap Equity Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. Large Cap Equity Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 21.60% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (21.51%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. SMALL CAP VALUE PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Small Cap Value Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. SMALL CAP VALUE PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 32.66% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (39.02%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. Targeted Value Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Targeted Value Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. Targeted Value Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 32.77% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (39.19%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. CORE EQUITY 1 PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Core Equity 1 Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. CORE EQUITY 1 PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 22.16% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (24.35%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. CORE EQUITY 2 PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Core Equity 2 Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. CORE EQUITY 2 PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 22.39% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (25.55%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. VECTOR EQUITY PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Vector Equity Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. VECTOR EQUITY PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 24.23% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (31.99%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. SMALL CAP PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Small Cap Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. SMALL CAP PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 28.70% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (32.73%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. MICRO CAP PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Micro Cap Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. MICRO CAP PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 30.59% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (34.75%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. High Relative Profitability Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. High Relative Profitability Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. High Relative Profitability Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 19.66% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (17.26%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| DFA REAL ESTATE SECURITIES PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Real Estate Securities Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA REAL ESTATE SECURITIES PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 17.88% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (23.06%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. Large Cap Growth Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Large Cap Growth Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. Large Cap Growth Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 21.45% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (16.69%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. Small Cap Growth Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Small Cap Growth Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. Small Cap Growth Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 27.16% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (30.33%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. Large Cap Equity Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. The table illustrates how annualized returns of the Institutional Class shares of the Portfolio for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Large Cap Equity Portfolio Institutional Class Shares1 —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | [1] | ||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. Large Cap Equity Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 21.60% | [1] | ||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (21.51%) | [1] | ||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. SMALL CAP VALUE PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. The table illustrates how annualized returns of the Institutional Class shares of the Portfolio for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Small Cap Value Portfolio Institutional Class Shares1 —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | [2] | ||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. SMALL CAP VALUE PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 32.66% | [2] | ||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (39.02%) | [2] | ||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. Targeted Value Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. The table illustrates how annualized returns of the Institutional Class shares of the Portfolio for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Targeted Value Portfolio Institutional Class Shares1 —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | [3] | ||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. Targeted Value Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 32.77% | [3] | ||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (39.19%) | [3] | ||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. CORE EQUITY 1 PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. The table illustrates how annualized returns of the Institutional Class shares of the Portfolio for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Core Equity 1 Portfolio Institutional Class Shares1 —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
|||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | [4] | ||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. CORE EQUITY 1 PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 22.16% | [4] | ||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (24.35%) | [4] | ||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. CORE EQUITY 2 PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. The table illustrates how annualized returns of the Institutional Class shares of the Portfolio for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Core Equity 2 Portfolio Institutional Class Shares1 —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | [5] | ||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. CORE EQUITY 2 PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 22.39% | [5] | ||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (25.55%) | [5] | ||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. VECTOR EQUITY PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. The table illustrates how annualized returns of the Institutional Class shares of the Portfolio for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Vector Equity Portfolio Institutional Class Shares1 —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | [6] | ||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. VECTOR EQUITY PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 24.23% | [6] | ||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (31.99%) | [6] | ||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. SMALL CAP PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. The table illustrates how annualized returns of the Institutional Class shares of the Portfolio for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Small Cap Portfolio Institutional Class Shares1 —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | [7] | ||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. SMALL CAP PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 28.70% | [7] | ||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (32.73%) | [7] | ||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. MICRO CAP PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. The table illustrates how annualized returns of the Institutional Class shares of the Portfolio for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Micro Cap Portfolio Institutional Class Shares1 —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
|||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | [8] | ||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. MICRO CAP PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 30.59% | [8] | ||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (34.75%) | [8] | ||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. High Relative Profitability Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. The table illustrates how annualized returns of the Institutional Class shares of the Portfolio for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. High Relative Profitability Portfolio Institutional Class Shares1 —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
|||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | [9] | ||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. High Relative Profitability Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 19.66% | [9] | ||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (17.26%) | [9] | ||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| DFA REAL ESTATE SECURITIES PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. The table illustrates how annualized returns of the Institutional Class shares of the Portfolio for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Real Estate Securities Portfolio Institutional Class Shares1 —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | [10] | ||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA REAL ESTATE SECURITIES PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 17.88% | [10] | ||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (23.06%) | [10] | ||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. Large Cap Growth Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. The table illustrates how annualized returns of the Institutional Class shares of the Portfolio for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Large Cap Growth Portfolio Institutional Class Shares1 —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | [11] | ||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. Large Cap Growth Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 21.45% | [11] | ||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (16.69%) | [11] | ||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. Small Cap Growth Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. The table illustrates how annualized returns of the Institutional Class shares of the Portfolio for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The ETF Class shares of the Portfolio are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns of the ETF Class shares of the Portfolio may vary from the returns of the Institutional Class shares due to differences in expenses. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Small Cap Growth Portfolio Institutional Class Shares1 —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | [12] | ||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. Small Cap Growth Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 27.16% | [12] | ||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (30.33%) | [12] | ||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| ENHANCED U.S. LARGE COMPANY PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Enhanced U.S. Large Company Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| ENHANCED U.S. LARGE COMPANY PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 22.61% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (21.18%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. LARGE CAP VALUE PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Large Cap Value Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. LARGE CAP VALUE PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 18.52% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (31.52%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| LARGE CAP INTERNATIONAL PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Large Cap International Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| LARGE CAP INTERNATIONAL PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 17.27% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (24.43%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| International Core Equity 2 Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | International Core Equity 2 Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| International Core Equity 2 Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 18.70% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (27.64%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Global Small Company Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Global Small Company Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| Global Small Company Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 24.12% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (31.85%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| INTERNATIONAL SMALL COMPANY PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | International Small Company Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| INTERNATIONAL SMALL COMPANY PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 21.00% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (30.21%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| JAPANESE SMALL COMPANY PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Japanese Small Company Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| JAPANESE SMALL COMPANY PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 13.25% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2022 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (20.45%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| ASIA PACIFIC SMALL COMPANY PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Asia Pacific Small Company Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| ASIA PACIFIC SMALL COMPANY PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 28.75% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (31.85%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| UNITED KINGDOM SMALL COMPANY PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | United Kingdom Small Company Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| UNITED KINGDOM SMALL COMPANY PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 28.40% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (39.22%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| CONTINENTAL SMALL COMPANY PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Continental Small Company Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| CONTINENTAL SMALL COMPANY PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 22.55% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (29.78%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| DFA International Real Estate Securities Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA International Real Estate Securities Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA International Real Estate Securities Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 16.00% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Sep. 30, 2024 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (32.87%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| DFA Global Real Estate Securities Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Global Real Estate Securities Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
|||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA Global Real Estate Securities Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 17.14% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (26.63%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| DFA INTERNATIONAL SMALL CAP VALUE PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA International Small Cap Value Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA INTERNATIONAL SMALL CAP VALUE PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 19.81% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (33.70%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| International Vector Equity Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | International Vector Equity Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| International Vector Equity Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 19.65% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (30.27%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| International High Relative Profitability Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | International High Relative Profitability Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
|||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| International High Relative Profitability Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 18.60% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (21.51%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| World ex U.S. Value Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | World ex U.S. Value Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| World ex U.S. Value Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 21.68% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (32.09%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| World ex U.S. Core Equity Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | World ex U.S. Core Equity Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| World ex U.S. Core Equity Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 19.54% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (28.06%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| World Core Equity Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | World Core Equity Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| World Core Equity Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 20.88% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (25.82%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Selectively Hedged Global Equity Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Selectively Hedged Global Equity Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| Selectively Hedged Global Equity Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 20.60% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (25.83%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| EMERGING MARKETS PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Emerging Markets Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| EMERGING MARKETS PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 20.24% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (27.13%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| EMERGING MARKETS VALUE PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Emerging Markets Value Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| EMERGING MARKETS VALUE PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 20.97% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (31.89%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Emerging Markets Targeted Value Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Emerging Markets Targeted Value Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| Emerging Markets Targeted Value Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 23.88% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (33.64%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| EMERGING MARKETS SMALL CAP PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Emerging Markets Small Cap Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| EMERGING MARKETS SMALL CAP PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 26.52% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (31.56%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Emerging Markets Core Equity 2 Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Emerging Markets Core Equity 2 Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| Emerging Markets Core Equity 2 Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 21.25% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (28.31%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Emerging Markets ex China Core Equity Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Emerging Markets ex China Core Equity Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| Emerging Markets ex China Core Equity Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 15.50% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2025 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (17.08%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | |||||||||||||||||||||||||||
| DFA ONE-YEAR FIXED INCOME PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA One-Year Fixed Income Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA ONE-YEAR FIXED INCOME PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 1.44% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Mar. 31, 2024 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (1.23%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| DFA TWO-YEAR GLOBAL FIXED INCOME PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Two-Year Global Fixed Income Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA TWO-YEAR GLOBAL FIXED INCOME PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 1.40% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Sep. 30, 2024 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (2.02%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| DFA Selectively Hedged Global Fixed Income Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Selectively Hedged Global Fixed Income Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA Selectively Hedged Global Fixed Income Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 3.13% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Mar. 31, 2016 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (3.46%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| DFA FIVE-YEAR GLOBAL FIXED INCOME PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Five-Year Global Fixed Income Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA FIVE-YEAR GLOBAL FIXED INCOME PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 2.32% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Mar. 31, 2016 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (4.58%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| DFA International Government Fixed Income Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA International Government Fixed Income Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA International Government Fixed Income Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 8.44% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (7.40%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | |||||||||||||||||||||||||||
| DFA SHORT-TERM GOVERNMENT PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Short-Term Government Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA SHORT-TERM GOVERNMENT PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 1.67% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Mar. 31, 2016 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (3.58%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| DFA INTERMEDIATE GOVERNMENT FIXED INCOME PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Intermediate Government Fixed Income Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA INTERMEDIATE GOVERNMENT FIXED INCOME PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 8.57% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (5.98%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| DFA Short-Term Extended Quality Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Short-Term Extended Quality Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA Short-Term Extended Quality Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 2.11% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (3.51%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| DFA Intermediate-Term Extended Quality Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Intermediate-Term Extended Quality Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA Intermediate-Term Extended Quality Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 8.77% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (7.79%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| DFA TARGETED CREDIT PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Targeted Credit Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA TARGETED CREDIT PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 4.15% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (4.69%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| DFA Global Core Plus Fixed Income Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Global Core Plus Fixed Income Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA Global Core Plus Fixed Income Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 7.73% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (7.39%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | |||||||||||||||||||||||||||
| DFA Investment Grade Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Investment Grade Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA Investment Grade Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 6.35% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (6.35%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| DFA Diversified Fixed Income Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Diversified Fixed Income Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA Diversified Fixed Income Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 4.23% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (3.59%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| DFA LTIP PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA LTIP Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA LTIP PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 11.74% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (22.34%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | |||||||||||||||||||||||||||
| DFA Inflation-Protected Securities Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Inflation-Protected Securities Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA Inflation-Protected Securities Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 5.01% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Mar. 31, 2016 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (6.52%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | |||||||||||||||||||||||||||
| DFA Short-Duration Real Return Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Short-Duration Real Return Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA Short-Duration Real Return Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 3.57% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (3.74%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| DFA Global Core Plus Real Return Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Global Core Plus Real Return Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA Global Core Plus Real Return Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 6.49% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (9.08%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | |||||||||||||||||||||||||||
| DFA Municipal Real Return Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Municipal Real Return Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA Municipal Real Return Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 5.26% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (5.41%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| DFA California Municipal Real Return Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA California Municipal Real Return Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA California Municipal Real Return Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 4.74% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (5.97%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| DFA Municipal Bond Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Municipal Bond Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA Municipal Bond Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 4.32% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (4.12%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| DFA SHORT-TERM MUNICIPAL BOND PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Short-Term Municipal Bond Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA SHORT-TERM MUNICIPAL BOND PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 1.36% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (0.96%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Sep. 30, 2022 | |||||||||||||||||||||||||||
| DFA Intermediate-Term Municipal Bond Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Intermediate-Term Municipal Bond Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA Intermediate-Term Municipal Bond Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 5.24% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (3.70%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| DFA Selective State Municipal Bond Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Selective State Municipal Bond Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA Selective State Municipal Bond Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 4.28% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (5.29%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| DFA Short-Term Selective State Municipal Bond Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Short-Term Selective State Municipal Bond Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA Short-Term Selective State Municipal Bond Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 1.59% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | 0.06% | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2023 | |||||||||||||||||||||||||||
| DFA California Short-Term Municipal Bond Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA California Short-Term Municipal Bond Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA California Short-Term Municipal Bond Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 1.35% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (1.20%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| DFA California Intermediate-Term Municipal Bond Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA California Intermediate-Term Municipal Bond Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA California Intermediate-Term Municipal Bond Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 4.98% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (3.95%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| DFA MN Municipal Bond Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA MN Municipal Bond Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
|||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA MN Municipal Bond Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 2.15% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (2.21%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| DFA NY MUNICIPAL BOND PORTFOLIO | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA NY Municipal Bond Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA NY MUNICIPAL BOND PORTFOLIO | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 1.56% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (1.46%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| DFA Oregon Municipal Bond Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Oregon Municipal Bond Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
|||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA Oregon Municipal Bond Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 4.17% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (3.92%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| World ex U.S. Targeted Value Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | World ex U.S. Targeted Value Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| World ex U.S. Targeted Value Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 21.61% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (33.95%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Dimensional VA U.S. Large Value Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The performance reflected in the bar chart for the Portfolio does not reflect any insurance company separate account charges, which if reflected would lower returns. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Dimensional VA U.S. Large Value Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| Dimensional VA U.S. Large Value Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 18.43% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (31.69%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Dimensional VA U.S. Targeted Value Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The performance reflected in the bar chart for the Portfolio does not reflect any insurance company separate account charges, which if reflected would lower returns. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Dimensional VA U.S. Targeted Value Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| Dimensional VA U.S. Targeted Value Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 33.64% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (39.71%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Dimensional VA International Value Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The performance reflected in the bar chart for the Portfolio does not reflect any insurance company separate account charges, which if reflected would lower returns. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Dimensional VA International Value Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| Dimensional VA International Value Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 22.15% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (31.89%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Dimensional VA International Small Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The performance reflected in the bar chart for the Portfolio does not reflect any insurance company separate account charges, which if reflected would lower returns. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Dimensional VA International Small Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| Dimensional VA International Small Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 21.42% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (30.27%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Dimensional VA Short-Term Fixed Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The performance reflected in the bar chart for the Portfolio does not reflect any insurance company separate account charges, which if reflected would lower returns. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Dimensional VA Short-Term Fixed Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| Dimensional VA Short-Term Fixed Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 1.40% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Mar. 31, 2024 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (1.18%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| Dimensional VA Global Bond Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The performance reflected in the bar chart for the Portfolio does not reflect any insurance company separate account charges, which if reflected would lower returns. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Dimensional VA Global Bond Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| Dimensional VA Global Bond Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 2.35% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Mar. 31, 2016 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (4.50%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| Dimensional VIT Inflation-Protected Securities Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The performance reflected in the bar chart for the Portfolio does not reflect any insurance company separate account charges, which if reflected would lower returns. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Dimensional VIT Inflation-Protected Securities Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| Dimensional VIT Inflation-Protected Securities Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 4.89% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Mar. 31, 2016 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (6.40%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | |||||||||||||||||||||||||||
| Dimensional VA Global Moderate Allocation Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The performance reflected in the bar chart for the Portfolio does not reflect any insurance company separate account charges, which if reflected would lower returns. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of additional indexes with similar investment universes of the Portfolio, or certain portions of the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Dimensional VA Global Moderate Allocation Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| Dimensional VA Global Moderate Allocation Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 14.04% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (16.53%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Dimensional VA Equity Allocation Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The performance reflected in the bar chart for the Portfolio does not reflect any insurance company separate account charges, which if reflected would lower returns. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Dimensional VA Equity Allocation Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| Dimensional VA Equity Allocation Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 20.70% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (26.56%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. Social Core Equity 2 Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Social Core Equity 2 Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. Social Core Equity 2 Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 23.06% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (26.41%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| International Social Core Equity Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | International Social Core Equity Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| International Social Core Equity Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 19.23% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (28.77%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Emerging Markets Social Core Equity Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Emerging Markets Social Core Equity Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| Emerging Markets Social Core Equity Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 21.30% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (28.29%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Global Social Core Equity Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Global Social Core Equity Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
|||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| Global Social Core Equity Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 21.41% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (27.28%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| DFA Social Fixed Income Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Social Fixed Income Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA Social Fixed Income Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 6.63% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (6.38%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| U.S. Sustainability Core 1 Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Sustainability Core 1 Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | The implementation and management of the Advisor’s “Sustainability” portfolios, including without limitation, the U.S. Sustainability Core 1 Portfolio is protected by U.S. Patent Nos. 7,596,525 B1, 7,599,874 B1 and 8,438,092 B2. |
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| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. Sustainability Core 1 Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 23.09% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (22.44%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| U.S. Sustainability Targeted Value Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | U.S. Sustainability Targeted Value Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | The implementation and management of the Advisor’s “Sustainability” portfolios, including without limitation, the U.S. Sustainability Targeted Value Portfolio is protected by U.S. Patent Nos. 7,596,525 B1, 7,599,874 B1 and 8,438,092 B2. |
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| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| U.S. Sustainability Targeted Value Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 20.84% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Mar. 31, 2021 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (12.62%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | |||||||||||||||||||||||||||
| International Sustainability Core 1 Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | International Sustainability Core 1 Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | The implementation and management of the Advisor’s “Sustainability” portfolios, including without limitation, the International Sustainability Core 1 Portfolio is protected by U.S. Patent Nos. 7,596,525 B1, 7,599,874 B1 and 8,438,092 B2. |
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| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| International Sustainability Core 1 Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 19.05% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (25.02%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Emerging Markets Sustainability Core 1 Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Emerging Markets Sustainability Core 1 Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | The implementation and management of the Advisor’s “Sustainability” portfolios, including without limitation, the Emerging Markets Sustainability Core Portfolio is protected by U.S. Patent Nos. 7,596,525 B1, 7,599,874 B1 and 8,438,092 B2. |
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| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| Emerging Markets Sustainability Core 1 Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 20.30% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (26.69%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Dimensional World ex U.S. Sustainability Targeted Value Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | Performance information is not available for the Portfolio because it has not yet completed a full calendar year of operations. Updated performance information for the Portfolio can be obtained in the future by visiting https://www.dimensional.com/us-en/funds. |
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| Performance One Year or Less [Text] | Performance information is not available for the Portfolio because it has not yet completed a full calendar year of operations. | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA Global Sustainability Fixed Income Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Global Sustainability Fixed Income Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Table Closing [Text Block] | The implementation and management of the Advisor’s “Sustainability” portfolios, including without limitation, the Global Sustainability Fixed Income Portfolio is protected by U.S. Patent Nos. 7,596,525 B1, 7,599,874 B1 and 8,438,092 B2. |
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| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA Global Sustainability Fixed Income Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 7.43% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (7.05%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| Dimensional VA Global Moderate Allocation Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the VA Global Moderate Allocation Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The Class L10 shares of the Portfolio are a new class of shares for which performance information is not available, therefore, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, another class of shares of the Portfolio not offered in this Prospectus. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. The performance reflected in the bar chart for the Portfolio does not reflect any insurance company separate account charges, which if reflected would lower returns. The table illustrates how annualized returns of the Institutional Class shares of the Portfolio for certain periods compare with those of a broad measure of market performance. The table also includes the performance of additional indexes with similar investment universes of the Portfolio, or certain portions of the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the VA Global Moderate Allocation Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The Class L10 shares of the Portfolio are a new class of shares for which performance information is not available, therefore, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, another class of shares of the Portfolio not offered in this Prospectus. The bar chart shows the changes in performance of the Institutional Class shares of the Portfolio from year to year. | |||||||||||||||||||||||||||
| Bar Chart, Returns for Class Not Offered in Prospectus [Text] | The Class L10 shares of the Portfolio are a new class of shares for which performance information is not available, therefore, the bar chart and table show performance information for the Institutional Class shares of the Portfolio, another class of shares of the Portfolio not offered in this Prospectus. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Dimensional VA Global Moderate Allocation Portfolio Institutional Class Shares1 —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | [13] | ||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| Dimensional VA Global Moderate Allocation Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 14.04% | [13] | ||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (16.53%) | [13] | ||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| DFA Commodity Strategy Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | DFA Commodity Strategy Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DFA Commodity Strategy Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 22.62% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Mar. 31, 2022 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (22.51%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| International Large Cap Growth Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | International Large Cap Growth Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| International Large Cap Growth Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 18.06% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (20.08%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| International Small Cap Growth Portfolio | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of an additional index with a similar investment universe as the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | International Small Cap Growth Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] | ||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| International Small Cap Growth Portfolio | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 25.47% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (28.42%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| DIMENSIONAL RETIREMENT INCOME FUND | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of additional indexes with similar investment universes of the Portfolio, or certain portions of the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | Retirement Income Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DIMENSIONAL RETIREMENT INCOME FUND | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 6.16% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (6.22%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | |||||||||||||||||||||||||||
| DIMENSIONAL 2015 TARGET DATE RETIREMENT INCOME FUND | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of additional indexes with similar investment universes of the Portfolio, or certain portions of the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | 2015 Target Date Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DIMENSIONAL 2015 TARGET DATE RETIREMENT INCOME FUND | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 8.25% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (9.55%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | |||||||||||||||||||||||||||
| DIMENSIONAL 2020 TARGET DATE RETIREMENT INCOME FUND | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of additional indexes with similar investment universes of the Portfolio, or certain portions of the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | 2020 Target Date Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DIMENSIONAL 2020 TARGET DATE RETIREMENT INCOME FUND | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 8.41% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (10.99%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | |||||||||||||||||||||||||||
| DIMENSIONAL 2025 TARGET DATE RETIREMENT INCOME FUND | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of additional indexes with similar investment universes of the Portfolio, or certain portions of the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | 2025 Target Date Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DIMENSIONAL 2025 TARGET DATE RETIREMENT INCOME FUND | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 10.45% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (13.19%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | |||||||||||||||||||||||||||
| DIMENSIONAL 2030 TARGET DATE RETIREMENT INCOME FUND | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of additional indexes with similar investment universes of the Portfolio, or certain portions of the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | 2030 Target Date Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DIMENSIONAL 2030 TARGET DATE RETIREMENT INCOME FUND | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 12.48% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (14.71%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | |||||||||||||||||||||||||||
| DIMENSIONAL 2035 TARGET DATE RETIREMENT INCOME FUND | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of additional indexes with similar investment universes of the Portfolio, or certain portions of the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | 2035 Target Date Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DIMENSIONAL 2035 TARGET DATE RETIREMENT INCOME FUND | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 14.49% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (14.75%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | |||||||||||||||||||||||||||
| DIMENSIONAL 2040 TARGET DATE RETIREMENT INCOME FUND | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of additional indexes with similar investment universes of the Portfolio, or certain portions of the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | 2040 Target Date Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DIMENSIONAL 2040 TARGET DATE RETIREMENT INCOME FUND | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 16.09% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (18.31%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| DIMENSIONAL 2045 TARGET DATE RETIREMENT INCOME FUND | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of additional indexes with similar investment universes of the Portfolio, or certain portions of the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | 2045 Target Date Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DIMENSIONAL 2045 TARGET DATE RETIREMENT INCOME FUND | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 18.61% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (21.68%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| DIMENSIONAL 2050 TARGET DATE RETIREMENT INCOME FUND | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of additional indexes with similar investment universes of the Portfolio, or certain portions of the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | 2050 Target Date Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DIMENSIONAL 2050 TARGET DATE RETIREMENT INCOME FUND | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 19.23% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (22.39%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| DIMENSIONAL 2055 TARGET DATE RETIREMENT INCOME FUND | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of additional indexes with similar investment universes of the Portfolio, or certain portions of the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
|||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | 2055 Target Date Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
|
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DIMENSIONAL 2055 TARGET DATE RETIREMENT INCOME FUND | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 19.39% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (22.31%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| DIMENSIONAL 2060 TARGET DATE RETIREMENT INCOME FUND | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of additional indexes with similar investment universes of the Portfolio, or certain portions of the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | 2060 Target Date Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| DIMENSIONAL 2060 TARGET DATE RETIREMENT INCOME FUND | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 19.33% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2020 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (22.36%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Mar. 31, 2020 | |||||||||||||||||||||||||||
| Dimensional 2065 Target Date Retirement Income Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. The table illustrates how annualized returns for certain periods, both before and after taxes, compare with those of a broad measure of market performance. The table also includes the performance of additional indexes with similar investment universes of the Portfolio, or certain portions of the Portfolio. The Portfolio’s past performance (before and after taxes) is not an indication of future results. Updated performance information for the Portfolio can be obtained by visiting https://www.dimensional.com/us-en/funds. The after-tax returns presented in the table for the Portfolio 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 an investor’s tax situation and may differ from those shown in the table. In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. |
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| Performance Past Does Not Indicate Future [Text] | The Portfolio’s past performance (before and after taxes) is not an indication of future results. | |||||||||||||||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The bar chart and table immediately following illustrate the variability of the Portfolio’s returns and are meant to provide some indication of the risks of investing in the Portfolio. The bar chart shows the changes in the Portfolio’s performance from year to year. | |||||||||||||||||||||||||||
| Bar Chart [Heading] | 2065 Target Date Portfolio Institutional Class Shares —Total Returns | |||||||||||||||||||||||||||
| Performance Table Heading | Annualized Returns (%) | |||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | The after-tax returns presented in the table for the Portfolio 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 | In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||
| Performance [Table] |
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| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deduction for fees, expenses or taxes on sales) | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
| Dimensional 2065 Target Date Retirement Income Fund | Institutional Class | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Highest Quarter | |||||||||||||||||||||||||||
| Highest Quarterly Return | 10.41% | |||||||||||||||||||||||||||
| Highest Quarterly Return, Date | Jun. 30, 2025 | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Lowest Quarter | |||||||||||||||||||||||||||
| Lowest Quarterly Return | (14.04%) | |||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | Jun. 30, 2022 | |||||||||||||||||||||||||||
| Dimensional 2070 Target Date Retirement Income Fund | ||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||||||||||||||
| Performance Narrative [Text Block] | Performance information is not available for the Portfolio because it has not yet completed a full calendar year of operations. Updated performance information for the Portfolio can be obtained in the future by visiting https://www.dimensional.com/us-en/funds. |
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| Performance One Year or Less [Text] | Performance information is not available for the Portfolio because it has not yet completed a full calendar year of operations. | |||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | https://www.dimensional.com/us-en/funds | |||||||||||||||||||||||||||
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