The investment objective of the U.S. Large Cap Value Portfolio is to achieve long-term capital appreciation. The U.S. Large Cap Value Portfolio is a Feeder Portfolio and pursues its objective by investing substantially all of its assets in its corresponding Master Fund, The U.S. Large Cap Value Series (the "U.S. Large Cap Value Series") of the Trust, which has the same investment objective and policies as the U.S. Large Cap Value Portfolio.

Expense [Heading]

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FEES AND EXPENSES OF THE PORTFOLIO

Expense Narrative [Text Block]

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This table describes the fees and expenses you may pay if you buy and hold Class R25 shares of the U.S. Large Cap Value Portfolio.

Shareholder Fees Caption [Text]

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Shareholder Fees (fees paid directly from your investment):

Operating Expenses Caption [Text]

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Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Heading]

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Portfolio Turnover

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The U.S. Large Cap Value Series 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 Portfolio shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the U.S. Large Cap Value Portfolio's performance. During the most recent fiscal year, the U.S. Large Cap Value Series' portfolio turnover rate was 28% of the average value of its investment portfolio.

Portfolio Turnover, Rate

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28.00%

Other Expenses, New Fund, Based on Estimates [Text]

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The Class R25 shares are a new class of shares of the Portfolio, so the "Other Expenses" shown for the class are based on anticipated fees and expenses for the fiscal period ending October 31, 2011

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Example

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This Example is meant to help you compare the cost of investing in the U.S. Large Cap Value Portfolio with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Portfolio for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Portfolio's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

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The Example reflects the aggregate estimated annual operating expenses of the U.S. Large Cap Value Portfolio and the Portfolio's portion of the expenses of the U.S. Large Cap Value Series.

Strategy [Heading]

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PRINCIPAL INVESTMENT STRATEGIES

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Dimensional Fund Advisors LP (the "Advisor") believes that equity investing should involve a long-term view and a systematic focus on sources of expected returns, not on stock picking or market timing. In constructing an investment portfolio, the Advisor identifies a broadly diversified universe of eligible securities with precisely-defined risk and return characteristics. It then places priority on efficiently managing portfolio turnover and keeping trading costs low. The Advisor does not intend to purchase or sell securities for the investment portfolio based on prospects for the economy, the securities markets or the individual issuers whose shares are eligible for purchase.

The U.S. Large Cap Value Portfolio pursues its investment objective by investing substantially all of its assets in the U.S. Large Cap Value Series. The U.S. Large Cap Value Series, using a market capitalization weighted approach, purchases a broad and diverse group of readily marketable common stocks of large U.S. companies that the Advisor determines to be value stocks. A company's market capitalization is the number of its shares outstanding times its price per share. In general, the higher the relative market capitalization of the U.S. large cap company, the greater its representation in the Series. The Advisor may modify market capitalization weights after considering such factors as free float, momentum, trading strategies, liquidity management and other factors that the Advisor determines appropriate, given market conditions. Securities are considered value stocks primarily because a company's shares have a high book value in relation to their market value (a "book to market ratio").

As a non-fundamental policy, under normal circumstances, the U.S. Large Cap Value Series will invest at least 80% of its net assets in securities of large cap U.S. companies. As of the date of this Prospectus, for purposes of the U.S. Large Cap Value Series, 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 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 U.S. operating companies listed on the New York Stock Exchange ("NYSE"), NYSE Alternext US LLC, Nasdaq Global Market^® or such other securities exchanges deemed appropriate by the Advisor. Under the Advisor's market capitalization guidelines described above, as of December 31, 2010, the market capitalization of a large cap company was $2,357 million, or above. This dollar amount will change due to market conditions.

The U.S. Large Cap Value Series and the U.S. Large Cap Value Portfolio each may use derivatives, such as futures contracts and options on futures contracts for U.S. equity securities and indices, to gain market exposure on their uninvested cash pending investment in securities or to maintain liquidity to pay redemptions.

The U.S. Large Cap Value Series may lend its portfolio securities to generate additional income.

Risk [Heading]

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PRINCIPAL RISKS

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Market Risk: Even a long-term investment approach cannot guarantee a profit. Economic, political, and issuer-specific events will cause the value of securities, and the U.S. Large Cap Value Series that owns them, and, in turn, the U.S. Large Cap Value Portfolio itself, to rise or fall. Because the value of your investment in the Portfolio will fluctuate, there is the risk that you will lose money.

Value Investment Risk: Value stocks may perform differently from the market as a whole and following a value-oriented investment strategy may cause the Portfolio to at times underperform equity funds that use other investment strategies.

Derivatives: Derivatives are securities, such as futures contracts, whose value is derived from that of other securities or indices. The use of derivatives for non-hedging purposes may be considered more speculative than other types of investments. When the U.S. Large Cap Value Series and U.S. Large Cap Value Portfolio use derivatives, the U.S. Large Cap Value Portfolio will be directly exposed to the risks of that derivative. Derivative securities are subject to a number of risks including liquidity, interest rate, market, credit and management risks, and the risk of improper valuation. Changes in the value of the derivative may not correlate perfectly with the underlying asset, rate or index, and the Portfolio could lose more than the principal amount invested.

Securities Lending: Securities lending involves the risk that the borrower may fail to return the securities in a timely manner or at all. As a result, the U.S. Large Cap Value Series may lose money and there may be a delay in recovering the loaned securities. The U.S. Large Cap Value Series 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 potential adverse tax consequences.

Risk Lose Money [Text]

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Because the value of your investment in the Portfolio will fluctuate, there is the risk that you will lose money.

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PERFORMANCE

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The bar chart and table immediately following illustrate the variability of the U.S. Large Cap Value Portfolio's returns and are meant to provide some indication of the risks of investing in the Portfolio. The Class R25 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 table illustrates how annualized one year, five year and ten year returns of the Institutional Class shares of the Portfolio compare with those of a broad measure of market performance. The U.S. Large Cap Value 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 www.dimensional.com.

Performance Information Illustrates Variability of Returns [Text]

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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 one year, five year and ten year returns of the Institutional Class shares of the Portfolio compare with those of a broad measure of market performance

Performance Availability Website Address [Text]

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www.dimensional.com

Performance Past Does Not Indicate Future [Text]

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The U.S. Large Cap Value Portfolio's past performance (before and after taxes) is not an indication of future results.

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U.S. Large Cap Value Portfolio Institutional Class Shares⁽¹⁾

Total Returns (%)

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January 2001-December 2010

Highest Quarter

Lowest Quarter

23.58 (4/09-6/09)

-27.86 (10/08-12/08)

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Periods ending December 31, 2010
Annualized Returns (%)

U.S. Large Cap Value Portfolio | Russell 1000 Value Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

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One Year

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15.51%

Five Years

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1.28%

Ten Years

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3.25%

[1]	The "Management Fee" includes an investment management fee payable by the U.S. Large Cap Value Series and an administration fee payable by the U.S. Large Cap Value Portfolio. The amounts set forth under "Other Expenses" and "Total Annual Fund Operating Expenses" reflect the direct expenses of the U.S. Large Cap Value Portfolio and the indirect expenses of the Portfolio's portion of the expenses of the U.S. Large Cap Value Series.
[2]	The Class R25 shares are a new class of shares of the Portfolio, so the "Other Expenses" shown for the class are based on anticipated fees and expenses for the fiscal period ending October 31, 2011.
[3]	The Institutional Class shares of the Portfolio would have substantially similar annual returns as the ClassR25 shares because the shares are invested in the same portfolio securities. Returns for the Class R25 shares and Institutional Class shares will differ to the extent that the classes will have different expenses, and returns for the Class R25 shares would be expected to be lower than the returns of the Institutional Class shares to the extent that the Class R25 shares have higher expenses than the Institutional Class shares.