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U.S. Large Cap Growth Portfolio  
Risk/Return: oef_RiskReturnAbstract  
Risk/Return [Heading] oef_RiskReturnHeading U.S. Large Cap Growth Portfolio
Objective [Heading] oef_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] oef_ObjectivePrimaryTextBlock

The investment objective of the U.S. Large Cap Growth Portfolio (the “Portfolio”) is to achieve long-term capital appreciation.
Expense Heading [Optional Text] oef_ExpenseHeading Fees and Expenses of the Portfolio
Expense Narrative [Text Block] oef_ExpenseNarrativeTextBlock

This table describes the fees and expenses you may pay if you buy, hold or sell ETF Class shares of the Portfolio. You may also incur usual and customary brokerage commissions when buying or selling the ETF Class shares of the Portfolio, which are not reflected in the table or Example that follows.
Shareholder Fees Caption [Optional Text] oef_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Optional Text] oef_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] oef_PortfolioTurnoverHeading PORTFOLIO TURNOVER
Portfolio Turnover [Text Block] oef_PortfolioTurnoverTextBlock

A fund generally pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in

the Example, affect the Portfolio’s performance. During the fiscal year ended October 31, 2024, the Portfolio's portfolio turnover rate was 11% of the average value of its investment portfolio.

Portfolio Turnover, Rate oef_PortfolioTurnoverRate 11.00%
Expense Example [Heading] oef_ExpenseExampleHeading EXAMPLE
Expense Example Narrative [Text Block] oef_ExpenseExampleNarrativeTextBlock

This Example is meant to help you compare the cost of investing in the Portfolio's ETF Class shares with the cost of investing in other funds. The Example assumes that you invest $10,000 in the Portfolio's ETF Class shares for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Portfolio’s operating expenses remain the same. The costs for the Portfolio's ETF Class shares reflect the net expenses of the Portfolio's ETF Class shares that result from the contractual expense waiver in the first year only. Although your actual costs may be higher or lower, based on these assumptions your costs whether you redeem or hold your shares would be:

Strategy [Heading] oef_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] oef_StrategyNarrativeTextBlock

To achieve the U.S. Large Cap Growth Portfolio’s investment objective, the Advisor implements an integrated investment approach that combines research, portfolio design, portfolio management, and trading functions. As further described below, the Portfolio’s design emphasizes long-term drivers of expected returns identified by the Advisor’s research, while balancing risk through broad diversification across companies and sectors. The Advisor’s portfolio management and trading processes further balance those long-term drivers of expected returns with shorter-term drivers of expected returns and trading costs.

The U.S. Large Cap Growth Portfolio is designed to purchase a broad and diverse group of readily marketable securities of large U.S. companies that the Advisor determines to have high profitability and high relative prices compared to other U.S. large cap companies at the time of purchase. A company’s market capitalization is the number of its shares outstanding times its price per share. Under a market capitalization weighted approach, companies with higher market capitalizations generally represent a larger proportion of the Portfolio than companies with relatively lower market capitalizations. Securities are considered higher relative price (growth) stocks primarily because a company’s shares have a high price in relation to their book value (a “price to book ratio”) when compared with other U.S. large cap companies. The Advisor may overweight certain stocks, including smaller companies, lower relative price (value) stocks, and/or higher profitability stocks within the large-cap growth segment of the U.S. market. In assessing relative price, the Advisor may consider additional factors such as price to cash flow or price to earnings ratios. An equity issuer is considered to have high profitability because it has high earnings or profits from operations in relation to its book value or assets. The criteria the Advisor uses for assessing relative price or profitability are subject to change from time to time.

As a non-fundamental policy, under normal circumstances, the U.S. Large Cap Growth Portfolio will invest at least 80% of its net assets in securities of large cap U.S. companies. The Advisor generally defines a U.S. company as one that is listed and principally traded on a securities exchange in the United States that is deemed appropriate by the Advisor. As of the date of this Prospectus, for purposes of the Portfolio, the Advisor considers large cap companies to be companies whose market capitalizations are generally in the highest 90% of total market capitalization or companies whose market capitalizations are larger than or equal to the 1,000th largest U.S. company, whichever results in the higher market capitalization break. Total market capitalization is based on the market capitalization of eligible U.S. operating companies listed on a securities exchange in the United States that is deemed appropriate by the Advisor. Under the Advisor’s market capitalization guidelines described above, based on market capitalization data as of October 31, 2025, the market capitalization of a large cap company would be $17,171 million or above. This threshold will change due to market conditions.

The Advisor may also increase or reduce the U.S. Large Cap Growth Portfolio’s exposure to an eligible company, or exclude a company, based on shorter-term considerations, such as a company’s price momentum and short-run reversals. In addition, the Advisor seeks to reduce trading costs using a flexible trading approach that looks for opportunities to participate in the available market liquidity, while managing turnover and explicit transaction costs.

The U.S. Large Cap Growth Portfolio may purchase or sell futures contracts and options on futures contracts for U.S. equity securities and indices, to increase or decrease equity market exposure based on actual or expected cash inflows to or outflows from the Portfolio.

The U.S. Large Cap Growth Portfolio may lend its portfolio securities to generate additional income.

The U.S. Large Cap Growth Portfolio's ETF Class operates as an actively managed exchange-traded fund ("ETF") and does not seek to replicate the performance of a specific index and may have a higher degree of portfolio turnover than passively managed index ETFs.
Bar Chart and Performance Table [Heading] oef_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] oef_PerformanceNarrativeTextBlock

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 Information Illustrates Variability of Returns [Text] oef_PerformanceInformationIllustratesVariabilityOfReturns 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.
Performance Availability Website Address [Text] oef_PerformanceAvailabilityWebSiteAddress https://www.dimensional.com/us-en/funds
Performance Past Does Not Indicate Future [Text] oef_PerformancePastDoesNotIndicateFuture The Portfolio’s past performance (before and after taxes) is not an indication of future results.
Bar Chart [Heading] oef_BarChartHeading U.S. Large Cap Growth Portfolio Institutional Class Shares1 —Total Returns
Performance Table Heading oef_PerformanceTableHeading Annualized Returns (%)
Index No Deduction for Fees, Expenses, or Taxes [Text] oef_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes) [1]
Performance Table Uses Highest Federal Rate oef_PerformanceTableUsesHighestFederalRate 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 oef_PerformanceTableNotRelevantToTaxDeferred 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.
U.S. Large Cap Growth Portfolio | Principal Risks  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

Principal Risks

Because the value of your investment in the Portfolio will fluctuate, there is the risk that you will lose money. An investment in the Portfolio is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit

Insurance Corporation or any other government agency. The following is a description of principal risks of investing in the Portfolio.
U.S. Large Cap Growth Portfolio | Risk Lose Money [Member]  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock Because the value of your investment in the Portfolio will fluctuate, there is the risk that you will lose money.
U.S. Large Cap Growth Portfolio | Risk Not Insured [Member]  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock An investment in the Portfolio is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
U.S. Large Cap Growth Portfolio | Equity Market Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

Equity Market Risk: Even a long-term investment approach cannot guarantee a profit. Economic, market, political, and issuer-specific conditions and events will cause the value of equity securities, and a fund that owns them, to rise or fall. Stock markets are volatile, with periods of rising prices and periods of falling prices.
U.S. Large Cap Growth Portfolio | Growth Investment Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

Growth Investment Risk: Growth stocks may perform differently from the market as a whole and an investment strategy purchasing these securities may cause the Portfolio to at times underperform equity funds that use other investment strategies.
U.S. Large Cap Growth Portfolio | Profitability Investment Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

Profitability Investment Risk: High relative profitability stocks may perform differently from the market as a whole and an investment strategy purchasing these securities may cause a fund to at times underperform equity funds that use other investment strategies.

 
U.S. Large Cap Growth Portfolio | Derivatives Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

Derivatives Risk: Derivatives are instruments, such as futures contracts, and options thereon, whose value is derived from that of other assets, rates or indices. The use of derivatives for non-hedging purposes may be considered to carry more risk than other types of investments. When a fund uses derivatives, the fund will be directly exposed to the risks of those derivatives. Derivative instruments are subject to a number of risks including counterparty, liquidity, interest rate, market, credit and management risks, as well as the risk of improper valuation. Changes in the value of a derivative may not correlate perfectly with the underlying asset, rate or index, and a fund could lose more than the principal amount invested.

U.S. Large Cap Growth Portfolio | Securities Lending Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

Securities Lending Risk: Securities lending involves the risk that the borrower may fail to return the securities in a timely manner or at all. As a result, a fund may lose money and there may be a delay in recovering the loaned securities. A fund could also lose money if it does not recover the securities and/or the value of the collateral falls, including the value of investments made with cash collateral. Securities lending also may have certain adverse tax consequences.
U.S. Large Cap Growth Portfolio | Operational Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

Operational Risk: Operational risks include human error, changes in personnel, system changes, faults in communication, and failures in systems, technology, or processes. Various operational events or circumstances are outside a fund’s or its advisor’s control, including instances at third parties. A fund and its advisor seek to reduce these operational risks through controls and procedures. However, measures that seek to reduce these operational risks through controls and procedures may not address every possible risk and may be inadequate to address these risks.
U.S. Large Cap Growth Portfolio | Cyber Security Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

Cyber Security Risk: A fund and its service providers’ use of internet, technology and information systems may expose the fund to potential risks linked to cyber security breaches of those technological or information systems. Cyber security breaches, amongst other things, could allow an unauthorized party to gain access to proprietary information, customer data, or fund assets, or cause the fund and/or its service providers to suffer data corruption or lose operational functionality.

The following is a description of additional principal risks of investing in the ETF Class shares of the Portfolio, due to the shares being listed and traded on a national securities exchange.
U.S. Large Cap Growth Portfolio | Market Trading Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

Market Trading Risk: Active trading markets for the ETF Class shares may not be developed or maintained by market makers or authorized participants. Authorized participants are not obligated to make a market in the ETF Class shares or to submit purchase or redemption orders for creation units, which may widen bid-ask spreads. Trading in shares on an exchange may be halted in certain circumstances. There can be no assurance that the requirements of the listing exchange necessary to maintain the listing of the ETF Class shares will continue to be met. Additionally, in stressed market conditions, the market for the ETF Class shares may become less liquid in response to deteriorating liquidity in the markets for a fund’s portfolio holdings, which may cause a significant variance in the market price of the ETF Class shares and their underlying value as well as an increase in the ETF Class shares’ bid-ask spread.
U.S. Large Cap Growth Portfolio | Premium/Discount Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

Premium/Discount Risk: The net asset value (“NAV”) of the ETF Class shares and the value of your investment may fluctuate. Disruptions to creations and redemptions or the market price of a fund’s holdings, the existence of extreme market volatility or potential lack of an active trading market for shares may widen bid-ask spreads and result in shares trading at a significant premium or discount to NAV. If a shareholder purchases shares at a time

when the market price is at a premium to the NAV or sells shares at a time when the market price is at a discount to the NAV, the shareholder may sustain losses.
U.S. Large Cap Growth Portfolio | Russell 1000® Growth Index  
Risk/Return: oef_RiskReturnAbstract  
Average Annual Return, Label [Optional Text] oef_AverageAnnualReturnLabel Russell 1000® Growth Index [1]
U.S. Large Cap Growth Portfolio | Russell 1000® Growth Index  
Risk/Return: oef_RiskReturnAbstract  
Average Annual Return, Percent oef_AvgAnnlRtrPct 33.36% [1]
Average Annual Return, Percent oef_AvgAnnlRtrPct 18.96% [1]
Average Annual Return, Percent oef_AvgAnnlRtrPct 16.78% [1]
U.S. Large Cap Growth Portfolio | Russell 1000® Index  
Risk/Return: oef_RiskReturnAbstract  
Average Annual Return, Label [Optional Text] oef_AverageAnnualReturnLabel Russell 1000® Index [1]
U.S. Large Cap Growth Portfolio | Russell 1000® Index  
Risk/Return: oef_RiskReturnAbstract  
Average Annual Return, Percent oef_AvgAnnlRtrPct 24.51% [1]
Average Annual Return, Percent oef_AvgAnnlRtrPct 14.28% [1]
Average Annual Return, Percent oef_AvgAnnlRtrPct 12.87% [1]
U.S. Large Cap Growth Portfolio | ETF Class  
Risk/Return: oef_RiskReturnAbstract  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.15%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.06% [2]
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.21%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets 0.03% [3]
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.18%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 18
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 65
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 115
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 265
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 18
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 65
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 115
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 265
U.S. Large Cap Growth Portfolio | Institutional Class  
Risk/Return: oef_RiskReturnAbstract  
Highest Quarterly Return, Label [Optional Text] oef_HighestQuarterlyReturnLabel Highest Quarter
Highest Quarterly Return, Date oef_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return oef_BarChartHighestQuarterlyReturn 21.45% [1]
Lowest Quarterly Return, Label [Optional Text] oef_LowestQuarterlyReturnLabel Lowest Quarter
Lowest Quarterly Return, Date oef_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return oef_BarChartLowestQuarterlyReturn (16.69%) [1]
Average Annual Return, Label [Optional Text] oef_AverageAnnualReturnLabel Return Before Taxes [1]
Average Annual Return, Percent oef_AvgAnnlRtrPct 23.83% [1]
Average Annual Return, Percent oef_AvgAnnlRtrPct 15.08% [1]
Average Annual Return, Percent oef_AvgAnnlRtrPct 13.84% [1]
Annual Return [Percent] oef_AnnlRtrPct 1.64%
Annual Return [Percent] oef_AnnlRtrPct 9.60%
Annual Return [Percent] oef_AnnlRtrPct 25.53%
Annual Return [Percent] oef_AnnlRtrPct (1.99%)
Annual Return [Percent] oef_AnnlRtrPct 32.17%
Annual Return [Percent] oef_AnnlRtrPct 21.80%
Annual Return [Percent] oef_AnnlRtrPct 26.82%
Annual Return [Percent] oef_AnnlRtrPct (15.56%)
Annual Return [Percent] oef_AnnlRtrPct 24.94%
Annual Return [Percent] oef_AnnlRtrPct 23.83%
U.S. Large Cap Growth Portfolio | Institutional Class | After Taxes on Distributions  
Risk/Return: oef_RiskReturnAbstract  
Average Annual Return, Label [Optional Text] oef_AverageAnnualReturnLabel Return After Taxes on Distributions [1]
Average Annual Return, Percent oef_AvgAnnlRtrPct 23.52% [1]
Average Annual Return, Percent oef_AvgAnnlRtrPct 14.01% [1]
Average Annual Return, Percent oef_AvgAnnlRtrPct 12.96% [1]
U.S. Large Cap Growth Portfolio | Institutional Class | After Taxes on Distributions and Sales  
Risk/Return: oef_RiskReturnAbstract  
Average Annual Return, Label [Optional Text] oef_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Portfolio Shares [1]
Average Annual Return, Percent oef_AvgAnnlRtrPct 14.31% [1]
Average Annual Return, Percent oef_AvgAnnlRtrPct 11.91% [1]
Average Annual Return, Percent oef_AvgAnnlRtrPct 11.36% [1]
[1]

As of December 31, 2024, the ETF Class shares of the Portfolio had not yet incepted. Performance shown prior to the inception date of the ETF Class shares is from the Portfolio's Institutional Class shares, a mutual fund class of shares of the Portfolio not offered in this Prospectus. Returns for the ETF Class shares and Institutional Class shares may vary due to differences in their expenses.
[2]

The ETF Class shares of the Portfolio are new, so the “Other Expenses" shown for the class are based on anticipated fees and expenses for the first full fiscal year.
[3]

Dimensional Fund Advisors LP (the “Advisor”) has agreed to waive certain fees and in certain instances, assume certain expenses of the ETF Class shares of the Portfolio. The Fee Waiver and/or Expense Assumption Agreement for the Portfolio will remain in effect through February 28, 2027, and may only be terminated by the Fund’s Board of Directors prior to that date. Under certain circumstances, the Advisor retains the right to seek reimbursement for any fees previously waived and/or expenses previously assumed up to thirty-six months after such fee waiver and/or expense assumption.