0000355437 didgi:S000038669Member 2011-10-23 2012-10-22 0000355437 didgi:S000038670Member 2011-10-23 2012-10-22 0000355437 didgi:S000038669Member didgi:C000119189Member 2011-10-23 2012-10-22 0000355437 2011-10-23 2012-10-22 0000355437 didgi:S000038670Member didgi:C000119190Member 2011-10-23 2012-10-22 pure iso4217:USD <div style="display:none">~ http://www.dimensional.com/role/ScheduleShareholderFeesInternationalSocialCoreEquityPortfolio column period compact * ~</div> <div style="display:none">~ http://www.dimensional.com/role/ScheduleShareholderFeesWorldexU.S.TargetedValuePortfolio column period compact * ~</div> www.dimensional.com Example www.dimensional.com Example <div style="display:none">~ http://www.dimensional.com/role/ScheduleAnnualFundOperatingExpensesInternationalSocialCoreEquityPortfolio column period compact * ~</div> <center>International Social Core Equity Portfolio</center> The Portfolio is a new portfolio, so the "Other Expenses" shown are based on anticipated fees and expenses for the first full fiscal year. A mutual 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 mutual 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. Because the Portfolio is new, information about portfolio turnover rate is not yet available. The Portfolio is a new portfolio, so the “Other Expenses” shown are based on anticipated fees and expenses for the first full fiscal year. <center>World ex U.S. Targeted Value Portfolio</center> A mutual 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 mutual fund shares are held in a taxable account. The Portfolio does not pay transaction costs when buying and selling shares of other mutual funds (the “Underlying Funds”); however, the Underlying Funds pay transaction costs when buying and selling securities for their portfolios. The transaction costs incurred by the Underlying Funds, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Portfolio’s performance. Because the Portfolio is new, information about portfolio turnover rate is not yet available. <div style="display:none">~ http://www.dimensional.com/role/ScheduleAnnualFundOperatingExpensesWorldexU.S.TargetedValuePortfolio column period compact * ~</div> 59 485BPOS DFA INVESTMENT DIMENSIONS GROUP INC 2012-10-22 -0.0047 This table describes the fees and expenses you may pay if you buy and hold shares of the Portfolio. This Example is meant to help you compare the cost of investing in the 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: Shareholder Fees (fees paid directly from your investment): Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) <center>PRINCIPAL INVESTMENT STRATEGIES</center> This table describes the fees and expenses you may pay if you buy and hold shares of the Portfolio. Shareholder Fees (fees paid directly from your investment): Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) This Example is meant to help you compare the cost of investing in the 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. The costs for the Portfolio reflect the net expenses of the Portfolio 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 would be: <center>PRINCIPAL INVESTMENT STRATEGIES</center> 82 0.00 0.0021 0.0058 186 0000355437 2012-10-22 2012-10-22 2012-10-22 false <div style="display:none">~ http://www.dimensional.com/role/ScheduleExpenseExampleTransposedInternationalSocialCoreEquityPortfolio column period compact * ~</div> 0.0017 0.0127 0.008 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 Portfolio purchases a broad and diverse group of stocks of non-U.S. companies in developed markets with a greater emphasis on small capitalization and value companies as compared to their representation in the International Universe, while excluding securities of certain companies based on the Portfolio’s social issue screens. For the Purposes of this Portfolio, the Advisor defines the International Universe as a market capitalization weighted portfolio of non-U.S. companies in developed markets that have been authorized as approved markets for investment by the Advisor’s Investment Committee. The Portfolio’s increased exposure to small capitalization and value companies may be achieved by decreasing the allocation of the Portfolio’s assets to the largest growth companies relative to their weight in the International Universe, which would result in a greater weight allocation to small capitalization and value companies. An equity issuer is considered a growth company primarily because it has a low, non-negative book value in relation to its market capitalization. An equity issuer is considered a value company primarily because it has a high book value in relation to its market capitalization.The Portfolio intends to purchase stocks of companies associated with developed market countries that the Advisor has designated as approved markets. As a non-fundamental policy, under normal circumstances, the Portfolio will invest at least 80% of its net assets in equity securities. The Advisor determines company size on a country or region specific basis and based primarily on market capitalization. The percentage allocation of the assets of the Portfolio to securities of the largest growth companies as defined above will generally be reduced from between 5% and 35% of their percentage weight in the International Universe. As of December 31, 2011, securities of the largest growth companies in the International Universe comprised approximately 16% of the International Universe. The percentage by which the Portfolio’s allocation to securities of the largest growth companies is reduced will fluctuate with market movements. Additionally, the range by which the Portfolio’s percentage allocation to the securities of the largest growth companies is reduced as compared to the International Universe will change from time to time.The Portfolio may gain exposure to companies associated with approved markets by purchasing equity securities in the form of depositary receipts, which may be listed or traded outside the issuer’s domicile country. The Portfolio may use derivatives, such as futures contracts and options on futures contracts for approved market or other equity market securities and indices, including those of the United States, to gain market exposure on its uninvested cash pending investment in securities or to maintain liquidity to pay redemptions. The above-referenced investments are not subject to, although they may incorporate, the Portfolio’s social criteria.The Portfolio may lend its portfolio securities to generate additional income.The Portfolio seeks to purchase securities that are consistent with the Portfolio’s social issue screens, which are monitored by an independent third party. The Portfolio seeks to exclude from its investment portfolio those companies that are identified by the Portfolio’s social issue screens, as further discussed below. The Portfolio’s social issue screens are designed to identify companies that: (1) earn at least 20% of their total business revenue through the production and/or sale of military weapons and/or weapons of mass destruction; (2) are engaged in certain for profit business activities in or with the Republic of the Sudan; (3) earn at least 15% of their total business revenue through the production and/or sale of tobacco or alcohol products; (4) earn at least 20% of their total business revenue from certain gambling activities, the production of goods used exclusively for gambling or the provision of certain services in casinos that are fundamental to gambling operations; (5) directly participate in abortions, or develop or manufacture abortive agents or contraceptives; (6) earn at least 15% of their total business revenue from the rental, sale, distribution or production of pornographic materials or the ownership or operation of adult entertainment establishments; (7) have had major recent controversies relating to child labor infractions in the U.S. or abroad; (8) are involved in the production of anti-personnel landmines, anti-vehicle landmines, or the essential components of these products; or (9) are involved in stem cell research. The Portfolio may modify this list of social issue screens, at any time, without prior shareholder approval or notice. 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 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.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. 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 Portfolio does not hedge foreign currency risk. Small Company Risk: Securities of small companies are often less liquid than those of large companies and this could make it difficult to sell a small company security at a desired time or price. As a result, small company stocks may fluctuate relatively more in price. In general, smaller capitalization companies are also more vulnerable than larger companies to adverse business or economic developments and they may have more limited resources. Social Investment Risk: The Portfolio’s social issue screens may limit the number of investment opportunities available to the Portfolio, and as a result, at times the Portfolio may produce different returns than funds that are not subject to such special investment conditions. For example, the Portfolio may decline to purchase certain securities when it is otherwise advantageous to do so, or the Portfolio may sell certain securities for social reasons when it is otherwise disadvantageous to do so.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. The use of derivatives for non-hedging purposes may be considered more speculative than other types of investments. When the 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 Portfolio may lose money and there may be a delay in recovering the loaned securities. The 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. February 28, 2014 Represents the amount of fees and expenses anticipated to be incurred by the Portfolio through its investments in other funds managed by the Advisor (the "Underlying Funds") and other investment companies for the first full fiscal year. Because the value of your investment in the Portfolio will fluctuate, there is the risk that you will lose money. <center>INVESTMENT OBJECTIVE</center> <center>FEES AND EXPENSES OF THE PORTFOLIO</center> Portfolio Turnover <center>PERFORMANCE</center> Because the value of your investment in the Portfolio will fluctuate, there is the risk that you will lose money. <center>INVESTMENT OBJECTIVE</center> <center>FEES AND EXPENSES OF THE PORTFOLIO Portfolio Turnover <center>PERFORMANCE</center> 356 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 Portfolio seeks to achieve its investment objective through exposure to a broad portfolio of securities of non-U.S. companies, with a focus on small and mid-cap value companies, associated with countries with developed and emerging markets, which may include frontier markets (emerging market countries in an earlier stage of development). An equity issuer is considered a value company primarily because it has a high book value in relation to its market capitalization. The Investment Committee of the Advisor designates the developed and emerging markets counties that are approved markets for which the Portfolio is authorized to invest. As an efficient means to achieve broad diversification across international markets, the World ex U.S. Targeted Value Portfolio may invest all or substantially all of its assets in other investment companies advised by the Advisor until the assets in the Portfolio reach a level that allows for the desired diversification across the international markets through direct investment in securities of non-U.S. operating companies. The point at which the Portfolio will begin purchasing securities of non-U.S. operating companies directly will depend on market movements and other factors that the Advisor will consider in seeking to efficiently manage the Portfolio, including minimizing the Portfolio’s costs in achieving the desired diversification across the international markets. At inception, the Portfolio will invest substantially all of its assets in the DFA International Small Cap Value Portfolio, the International Vector Equity Portfolio, the Dimensional Emerging Markets Value Fund and the Emerging Markets Small Cap Series (the “Underlying Funds”). When constructing the World ex U.S. Targeted Value Portfolio’s investment portfolio, the Advisor intends to consider federal tax implications when making investment decisions with respect to individual securities to seek to provide a tax advantage. When consistent with the Portfolio’s investment policies, the Advisor will buy and sell securities for the Portfolio considering the goals of: (i) delaying and minimizing the realization of net capital gains (e.g., selling stocks with capital losses to offset gains, realized or anticipated); and (ii) maximizing the extent to which any realized net capital gains are long-term in nature (i.e., taxable at lower capital gains tax rates). When buying and selling shares of the Underlying Funds or buying and selling individual securities for the Underlying Funds, the Advisor does not consider the federal tax implications of investment decisions. The World ex U.S. Targeted Value Portfolio may gain exposure to companies associated with approved markets by purchasing equity securities in the form of depositary receipts, which may be listed or traded outside the issuer’s domicile country. The Portfolio may use derivatives, such as futures contracts and options on futures contracts for approved market or other equity market securities and indices, including those of the United States, to gain market exposure on its uninvested cash pending investment in securities or to maintain liquidity to pay redemptions. The World ex U.S. Targeted Value Portfolio may lend its portfolio securities to generate additional income. Fund of Funds Risk: The investment performance of the Portfolio is affected by the investment performance of the Underlying Funds in which the Portfolio invests. The ability of the Portfolio to achieve its investment objective depends on the ability of the Underlying Funds to meet their investment objectives and on the Advisor’s decisions regarding the allocation of the Portfolio’s assets among the Underlying Funds. The Portfolio may allocate assets to an Underlying Fund that underperforms other funds. There can be no assurance that the investment objective of the Portfolio or any Underlying Fund will be achieved. When the Portfolio invests in Underlying Funds, investors are exposed to a proportionate share of the expenses of those Underlying Funds in addition to the expenses of the Portfolio. Through its investments in the Underlying Funds, the Portfolio is subject to the risks of the Underlying Funds’ investments. The risks listed below for the Portfolio include both the risks associated with direct investment in securities by the Portfolio and indirect investment in securities through the Portfolio’s investment in the Underlying Funds. 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 World ex U.S. Targeted Value Portfolio does not hedge foreign currency risk. Small Company Risk: Securities of small companies are often less liquid than those of large companies and this could make it difficult to sell a small company security at a desired time or price. As a result, small company stocks may fluctuate relatively more in price. In general, smaller capitalization companies are also more vulnerable than larger companies to adverse business or economic developments and they may have more limited resources. 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. 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 World ex U.S. Targeted Value 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. Emerging Markets Risk: Numerous emerging market countries have a history of, and continue to experience serious, and potentially continuing, economic and political problems. Stock markets in many emerging market countries are relatively small, expensive to trade in and generally have higher risks than those in developed markets. Foreigners are often limited in their ability to invest in, and withdraw assets from, these markets. Additional restrictions may be imposed under other conditions. Frontier market countries generally have smaller economies or less developed capital markets and, as a result, the risks of investing in emerging market countries are magnified in frontier market countries. Tax Advantage Strategy Risk: An investment strategy that considers the tax implications of investment decisions may alter the construction of the World ex U.S. Targeted Value Portfolio and affect portfolio holdings, when compared to other mutual funds that do not take into account potential tax implications. The Advisor anticipates that performance of the Portfolio may deviate from that of mutual funds that do not take into account potential tax implications. 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. The use of derivatives for non-hedging purposes may be considered more speculative than other types of investments. When the World ex U.S. Targeted Value 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 World ex U.S. Targeted Value Portfolio may lose money and there may be a delay in recovering the loaned securities. The 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. 0.00 <div style="display:none">~ http://www.dimensional.com/role/ScheduleExpenseExampleTransposedWorldexU.S.TargetedValuePortfolio column period compact * ~</div> 0.0037 0.0058 0.0052 The investment objective of the International Social Core Equity Portfolio (the “Portfolio”) is to achieve long-term capital appreciation. Performance information is not available for the Portfolio because it has not yet commenced operations. Performance information is not available for the Portfolio because it has not yet commenced operations. Updated performance information for the Portfolio can be obtained in the future by visiting www.dimensional.com. <center>PRINCIPAL RISKS</center> Performance information is not available for the Portfolio because it has not yet commenced operations. The investment objective of the World ex U.S. Targeted Value Portfolio (the “Portfolio”) is to achieve long-term capital appreciation. <center>PRINCIPAL RISKS</center> Performance information is not available for the Portfolio because it has not yet commenced operations. Updated performance information for the Portfolio can be obtained in the future by visiting www.dimensional.com. The Portfolio is a new portfolio, so the "Other Expenses" shown are based on anticipated fees and expenses for the first full fiscal year. Represents the amount of fees and expenses anticipated to be incurred by the Portfolio through its investments in other funds managed by the Advisor (the "Underlying Funds") and other investment companies for the first full fiscal year. Pursuant to a Fee Waiver and Expense Assumption Agreement for the Portfolio, the Advisor has contractually agreed to waive up to the full amount of the Portfolio's management fee of 0.58% to the extent necessary to offset the proportionate share of the management fees paid by the Portfolio through its investment in other funds managed by the Advisor (the "Underlying Funds"). In addition, under the Fee Waiver and Expense Assumption Agreement, the Advisor has also agreed to waive all or a portion of the management fee and to assume the ordinary operating expenses of a class of the Portfolio (including expenses incurred through its investment in other investment companies but excluding any applicable 12b-1 fees) ("Portfolio Expenses") to the extent necessary to limit the Portfolio Expenses of a class of the Portfolio to 0.80% of the average net assets of a class of the Portfolio on an annualized basis (the "Expense Limitation Amount"). At any time that the Portfolio Expenses of a class of the Portfolio are less than the Expense Limitation Amount for a class of the Portfolio, the Advisor retains the right to seek reimbursement for any fees previously waived and/or expenses previously assumed to the extent that such reimbursement will not cause the annualized Portfolio Expenses of a class of the Portfolio to exceed the Expense Limitation Amount. The Portfolio is not obligated to reimburse the Advisor for fees previously waived or expenses previously assumed by the Advisor more than thirty-six months before the date of such reimbursement. The Fee Waiver and Expense Assumption Agreement for the Portfolio will remain in effect through February 28, 2014, and may not be terminated by the Advisor prior to that date.