XML 71 R644.htm IDEA: XBRL DOCUMENT v2.4.0.8
Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName DFA INVESTMENT DIMENSIONS GROUP INC
Prospectus Date rr_ProspectusDate Feb. 28, 2014
International Large Cap Growth Portfolio
  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading International Large Cap Growth Portfolio
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock The investment objective of the International Large Cap Growth Portfolio is to achieve long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading FEES AND EXPENSES OF THE PORTFOLIO
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock This table describes the fees and expenses you may pay if you buy and hold shares of the International Large Cap Growth Portfolio.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment):
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination February 28, 2015
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock 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 International Large Cap Growth Portfolio’s performance. For the period December 20, 2012 (commencement of operations) to October 31, 2013, the International Large Cap Growth Portfolio’s portfolio turnover rate was 3% of the average value of its investment portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 3.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock This Example is meant to help you compare the cost of investing in the International Large Cap Growth 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:
Strategy [Heading] rr_StrategyHeading PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock 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. In general, 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 International Large Cap Growth Portfolio, using a market capitalization weighted approach, purchases securities of large, non-U.S. companies in countries with developed markets that the Advisor determines to have high expected profitability and valuation ratios relative to other non-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. In general, the higher the relative market capitalization of a large company within an eligible country, the greater its representation in the Portfolio. The Advisor may modify market capitalization weights and even exclude companies after considering such factors as free float, momentum, trading strategies, liquidity management, and expected profitability, as well as other factors that the Advisor determines to be appropriate, given market conditions. Companies are considered to have high valuation ratios primarily because a company’s shares have a high market value in relation to their book value (a “market to book ratio”) when compared with other non-U.S. large cap companies. In assessing high valuation ratio companies, the Advisor may consider additional factors such as price to cash flow or price to earnings ratios, as well as economic conditions and developments in the issuer’s industry. Securities of companies that have high valuation ratios are often considered to be growth stocks. In assessing expected profitability, the Advisor may consider different ratios, such as that of earnings or profits from operations relative to book value or assets.

The International Large Cap Growth Portfolio intends to purchase securities of non-U.S. large cap companies that are eligible based on their valuation ratio and expected profitability and are associated with developed market countries that the Advisor has designated as approved markets. As a non-fundamental policy, under normal circumstances, the International Large Cap Growth Portfolio will invest at least 80% of its net assets in securities of large companies in the particular markets in which it invests. The Advisor determines the minimum market capitalization of a large company with respect to each country in which the Portfolio invests. In the countries or regions authorized for investment, the Advisor first ranks eligible companies listed on selected exchanges based on the companies’ market capitalizations. The Advisor then determines the universe of eligible stocks by defining the minimum market capitalization of a large company that may be purchased by the Portfolio with respect to each country or region. As of December 31, 2013, for the International Large Cap Growth Portfolio, the lowest minimum market capitalization of a large company in any country in which the International Large Cap Growth Portfolio would invest was $1,628 million. This threshold will vary by country or region. For example, as of December 31, 2013, the Advisor considered a large company in the European Monetary Union (“EMU”) to have a market capitalization of at least $5,024 million, a large company in Israel to have a market capitalization of at least $1,628 million, and a large company in the United Kingdom to have a market capitalization of at least $5,399 million. This threshold will change due to market conditions. The International Large Cap Growth 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 International Large Cap Growth Portfolio also may use derivatives, such as futures contracts and options on futures contracts for foreign and U.S. equity securities and indices, to gain market exposure on its uninvested cash pending investment in securities or to maintain liquidity to pay redemptions.

The International Large Cap Growth Portfolio may lend its portfolio securities to generate additional income.
Risk [Heading] rr_RiskHeading PRINCIPAL RISKS
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock 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 International Large Cap Growth 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.

Investment Strategy Risk: Securities that have high valuation ratios and high expected profitability 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.

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 International Large Cap Growth Portfolio does not hedge foreign currency risk.

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 International Large Cap Growth 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 counterparty, 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 International Large Cap Growth Portfolio may lose money and there may be a delay in recovering the loaned securities. The International Large Cap Growth 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.
Risk Lose Money [Text] rr_RiskLoseMoney Because the value of your investment in the Portfolio will fluctuate, there is the risk that you will lose money.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading PERFORMANCE
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The bar chart and table immediately following illustrate the variability of the International Large Cap Growth 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 and since inception returns, 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 www.dimensional.com.

The after-tax returns presented in the table for the International Large Cap Growth 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] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and table immediately following illustrate the variability of the International Large Cap Growth 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.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.dimensional.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Portfolio’s past performance (before and after taxes) is not an indication of future results.
Bar Chart [Heading] rr_BarChartHeading International Large Cap Growth Portfolio Institutional Class Shares
Total Returns (%)
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock January 2013-December 2013

Highest Quarter    Lowest Quarter
11.51 (7/13-9/13)    -0.14 (4/13-6/13)
Performance Table Heading rr_PerformanceTableHeading Periods ending December 31, 2013
Annualized Returns (%)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate The after-tax returns presented in the table for the International Large Cap Growth 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 rr_PerformanceTableNotRelevantToTaxDeferred 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.
International Large Cap Growth Portfolio | Institutional Class
  
Risk/Return: rr_RiskReturnAbstract  
Shareholder Fees (fees paid directly from your investment) rr_ShareholderFeeOther none
Management Fee rr_ManagementFeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.40%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.65%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets 0.35% [1]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 0.30%
1 Year rr_ExpenseExampleYear01 31
3 Years rr_ExpenseExampleYear03 173
5 Years rr_ExpenseExampleYear05 328
10 Years rr_ExpenseExampleYear10 $ 777
2013 rr_AnnualReturn2013 22.99%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2013
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 11.51%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Jun. 30, 2013
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (0.14%)
One Year rr_AverageAnnualReturnYear01 22.99%
Since Inception rr_AverageAnnualReturnSinceInception 22.60%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2012
International Large Cap Growth Portfolio | Return After Taxes on Distributions | Institutional Class
  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 22.36%
Since Inception rr_AverageAnnualReturnSinceInception 21.99%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2012
International Large Cap Growth Portfolio | Return After Taxes on Distributions and Sale of Portfolio Shares | Institutional Class
  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 13.41%
Since Inception rr_AverageAnnualReturnSinceInception 17.14%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 20, 2012
International Large Cap Growth Portfolio | MSCI World ex USA Growth Index (net dividends) (reflects no deduction for fees, expenses, or taxes on sales)
  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 20.53%
Since Inception rr_AverageAnnualReturnSinceInception 19.08%
[1] Pursuant to a Fee Waiver and Expense Assumption Agreement for the Portfolio, the Advisor has contractually agreed to waive all or a portion of its management fee and to assume the ordinary operating expenses of a class of the Portfolio (excluding the expenses that the Portfolio incurs indirectly through its investment in other investment companies and excluding any applicable 12b-1 fees) ("Portfolio Expenses") to the extent necessary to limit the Portfolio Expenses of a class of the Portfolio on an annualized basis, to 0.30% of the average net assets (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 such class of shares 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 for such class of shares 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 prior to the date of such reimbursement. The Fee Waiver and Expense Assumption Agreement for the Portfolio will remain in effect through February 28, 2015, and may only be terminated by the Fund's Board of Directors prior to that date.