The Enhanced U.S. Large Company Portfolio seeks, as its investment objective, to achieve a total return which exceeds the total return performance of the S&P 500^® Index. Total return is comprised of income and capital appreciation.

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 shares of the Enhanced U.S. Large Company 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 Enhanced U.S. Large Company Portfolio 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 Portfolio's performance. During the most recent fiscal year, the Enhanced U.S. Large Company Portfolio's portfolio turnover rate was 140% of the average value of its investment portfolio.

Portfolio Turnover, Rate

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140.00%

Expense Example [Heading]

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Example

Expense Example Narrative [Text Block]

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This Example is meant to help you compare the cost of investing in the Enhanced U.S. Large Company 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:

Strategy [Heading]

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PRINCIPAL INVESTMENT STRATEGIES

Strategy Narrative [Text Block]

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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 Enhanced U.S. Large Company Portfolio seeks to outperform the S&P 500^® Index primarily through investment in S&P 500^® Index futures and short-term fixed income obligations. The Enhanced U.S. Large Company Portfolio may invest in all of the stocks represented in the S&P 500^® Index, options on stock indices, stock index futures, options on stock index futures, swap agreements on stock indices and shares of investment companies that invest in stock indices. The Portfolio invests in fixed income obligations, which may include securities of foreign issuers. The Portfolio may, from time to time, also invest in options on stock indices, stock index futures, options on stock index futures and swap agreements based on indices other than, but similar to, the S&P 500^® Index (such instruments whether or not based on the S&P 500^® Index are hereinafter collectively referred to as "Index Derivatives"). The S&P 500^® Index is comprised of a broad and diverse group of stocks. Generally, these are the U.S. stocks with the largest market capitalizations and, as a group, they represent approximately 75% of the total market capitalization of all publicly traded U.S. stocks. The Advisor considers stocks that comprise the S&P 500^® Index to be those of large companies. Under normal circumstances, the Enhanced U.S. Large Company Portfolio will invest at least 80% of its net assets in short-term fixed income obligations that are overlaid by futures, swaps and other derivatives of the S&P 500^® Index to create exposure to the performance of large U.S. companies or in securities of large U.S. companies directly. Alternatively, the Portfolio may invest at least 80% of its net assets directly in securities of large companies.

The Enhanced U.S. Large Company Portfolio may invest all of its assets in Index Derivatives. Certain of these Index Derivatives are speculative and may subject the Portfolio to additional risks. Assets of the Portfolio not invested in S&P 500^® Index or Index Derivatives may be invested in short-term fixed income obligations including: U.S. government obligations, U.S. government agency obligations, corporate debt obligations, bank obligations, commercial paper, repurchase agreements, foreign government and agency obligations, supranational organization obligations, foreign issuer obligations and eurodollar obligations. The Portfolio's investment in fixed income obligations will be considered investment grade at the time of purchase. The fixed income obligations purchased by the Portfolio will typically mature within two years from the date of settlement and the average dollar-weighted maturity of the fixed income obligations will be two years or less.

The Enhanced U.S. Large Company Portfolio may use foreign currency contracts to hedge foreign currency risks. The Enhanced U.S. Large Company Portfolio uses index swap agreements and/or stock index futures to hedge against changes in securities prices. The Enhanced U.S. Large Company Portfolio may use derivatives, such as futures contracts and options on futures contracts, to gain market exposure on its uninvested cash pending investment in securities or to maintain liquidity to pay redemptions. Additionally, the Enhanced U.S. Large Company Portfolio uses index swap agreements and stock index futures to attempt to achieve its investment objectives.

The Enhanced U.S. Large Company Portfolio may lend its portfolio securities to generate additional income.

About the S&P 500^® Index: The Standard & Poor's 500 Composite Stock Price Index^® is market capitalization weighted (adjusted for free float). Its performance is usually cyclical because it reflects periods when stock prices generally rise or fall. For information concerning Standard & Poor's Rating Group, a division of The McGraw Hill Companies ("S&P"), and disclaimers of S&P with respect to the Enhanced U.S. Large Company Portfolio, see "Standard & Poor's—Information and Disclaimers."

Risk [Heading]

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PRINCIPAL RISKS

Risk Narrative [Text Block]

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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 Enhanced U.S. Large Company Portfolio that owns them, to rise or fall. Because the value of your investment in the Portfolio will fluctuate, there is the risk that you will lose money.

Foreign Securities and Currencies Risk: Foreign securities prices may decline or fluctuate because of: (a) economic or political actions of foreign governments, and/or (b) less regulated or liquid securities markets. Investors holding these securities may also be exposed to foreign currency risk (the possibility that foreign currency will fluctuate in value against the U.S. dollar or that a foreign government will convert, or be forced to convert, its currency to another currency, changing its value against the U.S. dollar). The Enhanced U.S. Large Company Portfolio may hedge foreign currency risk.

Foreign Government Debt Risk. The risk that: (a) the governmental entity that controls the repayment of government debt may not be willing or able to repay the principal and/or to pay the interest when it becomes due, due to factors such as political considerations, the relative size of the governmental entity's debt position in relation to the economy, cash flow problems, insufficient foreign currency reserves, the failure to put in place economic reforms required by the International Monetary Fund or other multilateral agencies, and/or other national economic factors; (b) governments may default on their debt securities, which may require holders of such securities to participate in debt rescheduling; and (c) there is no legal or bankruptcy process by which defaulted government debt may be collected in whole or in part.

Derivatives Risk: Derivatives are instruments, such as futures and foreign exchange forward contracts, whose value is derived from that of other assets, rates or indices. Derivatives can be used for hedging (attempting to reduce risk by offsetting one investment position with another) or non-hedging purposes. Hedging with derivatives may increase expenses, and there is no guarantee that a hedging strategy will work. While hedging can reduce or eliminate losses, it can also reduce or eliminate gains. The use of derivatives for non-hedging purposes may be considered more speculative than other types of investments. When the Enhanced U.S. Large Company Portfolio uses derivatives, the Portfolio will be directly exposed to the risks of that derivative. Derivative instruments 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 a 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 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, the Enhanced U.S. Large Company Portfolio may lose money and there may be a delay in recovering the loaned securities. The Enhanced U.S. Large Company Portfolio 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.

Interest Rate Risk: Fixed income securities are subject to interest rate risk because the prices of fixed income securities tend to move in the opposite direction of interest rates. When interest rates rise, fixed income security prices fall. When interest rates fall, fixed income security prices rise. In general, fixed income securities with longer maturities are more sensitive to these price changes.

Credit Risk: Credit risk is the risk that the issuer of a security may be unable to make interest payments and/or repay principal when due. A downgrade to an issuer's credit rating or a perceived change in an issuer's financial strength may affect a security's value, and thus, impact the Enhanced U.S. Large Company Portfolio's performance. Credit risk is greater for fixed income securities with ratings below investment grade (BB or below by Standard & Poor's Rating Group or Ba or below by Moody's Investors Service, Inc.). Fixed income securities that are below investment grade involve high credit risk and are considered speculative.

Income Risk: Income risk is the risk that falling interest rates will cause the Enhanced U.S. Large Company Portfolio's income to decline.

Call Risk: Call risk is the risk that during periods of falling interest rates, a bond issuer will call or repay a higher-yielding bond before its maturity date, forcing the Portfolio to reinvest in bonds with lower interest rates than the original obligations.

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

Performance Narrative [Text Block]

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The bar chart and table immediately following illustrate the variability of the Enhanced U.S. Large Company 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 one year, five year and ten year returns, both before and after taxes, compare with those of a broad measure of market performance. Enhanced U.S. Large Company 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.

The after-tax returns presented in the table for the Enhanced U.S. Large Company 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-deferred arrangements, such as 401(k) plans or individual retirement accounts.

Performance Information Illustrates Variability of Returns [Text]

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Performance Availability Website Address [Text]

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www.dimensional.com

Performance Past Does Not Indicate Future [Text]

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

Bar Chart [Heading]

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Enhanced U.S. Large Company Portfolio Institutional Class Shares

Total Returns (%)

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January 2002-December 2011
Highest Quarter		Lowest Quarter
16.84 (4/09-6/09)		-21.78 (10/08-12/08)

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Periods ending December 31, 2011

Annualized Returns (%)

Performance Table Uses Highest Federal Rate

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Performance Table Not Relevant to Tax Deferred

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In addition, the after-tax returns shown are not relevant to investors who hold shares of the Portfolio through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.

ENHANCED U.S. LARGE COMPANY PORTFOLIO | S&P 500® Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

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One Year

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2.11%

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Five Years

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(0.25%)

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Ten Years

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2.92%

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[1]	Since the "Acquired Fund Fees and Expenses" are not directly borne by the Portfolio, they are not reflected in the Portfolio's financial statements, and therefore, the amounts listed in "Total Annual Fund Operating Expenses" will differ from those presented in the Financial Highlights.
[2]	Copyright© 2010 Standard & Poor's Financial Services LLC, a subsidiary of The McGraw-Hill Companies, Inc. All rights reserved.