XML 15 R3.htm IDEA: XBRL DOCUMENT v2.4.1.9
Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName DFA INVESTMENT DIMENSIONS GROUP INC
Prospectus Date rr_ProspectusDate Feb. 28, 2015
Supplement [Text Block] didgi_SupplementTextBlock

DFA INVESTMENT DIMENSIONS GROUP INC.

 

SUPPLEMENT TO THE PROSPECTUS DATED FEBRUARY 28, 2015

 

INTERNATIONAL CORE EQUITY PORTFOLIO

INTERNATIONAL VECTOR EQUITY PORTFOLIO

WORLD EX U.S. VALUE PORTFOLIO

WORLD EX U.S. TARGETED VALUE PORTFOLIO

WORLD EX U.S. CORE EQUITY PORTFOLIO

WORLD CORE EQUITY PORTFOLIO

(formerly, Dimensional Retirement Equity Fund II)

SELECTIVELY HEDGED GLOBAL EQUITY PORTFOLIO

 

INSTITUTIONAL CLASS SHARES

 

The purpose of this Supplement to the Prospectus is to replace the performance tables in the Prospectus and the prior Supplement for the Portfolios listed above.                

 

The performance table in the Prospectus for the International Core Equity Portfolio is replaced with the following table:

 

     Periods ending December 31, 2014
  
Annualized Returns (%)
    One Year
     Five Years
     Since
9/15/05
Inception
  
International Core Equity Portfolio
                         
Return Before Taxes
      -5.98 %      5.91 %      4.62 % 
Return After Taxes on Distributions
      -6.67 %      5.24 %      4.05 % 
Return After Taxes on Distributions and Sale of Portfolio Shares
      -2.84 %      4.59 %      3.70 % 
MSCI World ex USA Index (net dividends)
(reflects no deduction for fees, expenses, or taxes on sales)
      -4.32 %      5.21 %      4.11 % 

 

The performance table in the Prospectus for the International Vector Equity Portfolio is replaced with the following table:

 

     Periods ending December 31, 2014
  
Annualized Returns (%)
    One Year
     Five Years
     Since
8/14/08
  Inception  
  
International Vector Equity Portfolio
                         
Return Before Taxes
      -6.27 %      6.18 %      4.34 % 
Return After Taxes on Distributions
      -7.13 %      5.39 %      3.68 % 
Return After Taxes on Distributions and Sale of Portfolio Shares
      -2.94 %      4.83 %      3.39 % 
MSCI World ex USA Index (net dividends)
(reflects no deduction for fees, expenses, or taxes on sales)
      -4.32 %      5.21 %      2.47 % 

 

The performance table in the Prospectus for the World ex U.S. Value Portfolio is replaced with the following table:

 

     Periods ending December 31, 2014
  
Annualized Returns (%)
    One Year
     Since
8/23/10
Inception
  
World ex U.S. Value Portfolio
                 
Return Before Taxes
      -6.19 %      5.03 % 
Return After Taxes on Distributions
      -7.11 %      4.35 % 
Return After Taxes on Distributions and Sale of Portfolio Shares
      -2.86 %      3.93 % 
MSCI All Country World ex USA Index (net dividends)
(reflects no deduction for fees, expenses, or taxes on sales)
      -3.87 %      6.33 % 

The performance table in the Prospectus for the World ex U.S. Targeted Value Portfolio is replaced with the following table:

 

     Periods ending December 31, 2014
  
Annualized Returns (%)
    One Year
     Since
11/01/12
  Inception  
  
World ex U.S. Targeted Value Portfolio
                 
Return Before Taxes
      -4.49 %      10.01 % 
Return After Taxes on Distributions
      -5.08 %      9.12 % 
Return After Taxes on Distributions and Sale of Portfolio Shares
      -2.15 %      7.60 % 
MSCI All Country World ex USA Small Cap Index (net dividends)
(reflects no deduction for fees, expenses, or taxes on sales)
      -4.03 %      8.66 % 

 

The performance table in the Prospectus for the World ex U.S. Core Equity Portfolio is replaced with the following table:

 

     Periods ending December 31, 2014
  
Annualized Returns (%)
    One Year
     Since
4/09/13
Inception
  
World ex U.S. Core Equity Portfolio
                 
Return Before Taxes
      -4.86 %      3.23 % 
Return After Taxes on Distributions
      -5.39 %      2.46 % 
Return After Taxes on Distributions and Sale of Portfolio Shares
      -2.32 %      2.36 % 
MSCI All Country World ex USA Index (net dividends)
(reflects no deduction for fees, expenses, or taxes on sales)
      -3.87 %      4.50 % 

 

The performance table in the Prospectus for the World Core Equity Portfolio is replaced with the following table:

 

     Periods ending December 31, 2014
  
Annualized Returns (%)
    One Year
     Since
3/07/12
  Inception  
  
World Core Equity Portfolio
                 
Return Before Taxes
      2.48 %      13.04 % 
Return After Taxes on Distributions
      1.90 %      12.31 % 
Return After Taxes on Distributions and Sale of Portfolio Shares
      1.81 %      10.09 % 
MSCI All Country World Index (net dividends)
(reflects no deduction for fees, expenses, or taxes on sales)
      4.16 %      11.69 % 

 

The performance table in the Prospectus for the Selectively Hedged Global Equity Portfolio is replaced with the following table:

 

     Periods ending December 31, 2014
  
Annualized Returns (%)
    One Year  
     Since
11/14/11
  Inception  
  
Selectively Hedged Global Equity Portfolio
                 
Return Before Taxes
      3.91 %      14.28 % 
Return After Taxes on Distributions
      2.42 %      13.13 % 
Return After Taxes on Distributions and Sale of Portfolio Shares
      2.74 %      10.94 % 
MSCI All Country World Index (net dividends)
(reflects no deduction for fees, expenses, or taxes on sales)
      4.16 %      12.95 % 

The date of this Supplement is March 20, 2015
INTERNATIONAL CORE EQUITY PORTFOLIO  
Risk/Return: rr_RiskReturnAbstract  
Supplement [Text Block] didgi_SupplementTextBlock

DFA INVESTMENT DIMENSIONS GROUP INC.

 

SUPPLEMENT TO THE PROSPECTUS DATED FEBRUARY 28, 2015

 

INTERNATIONAL CORE EQUITY PORTFOLIO

 

INSTITUTIONAL CLASS SHARES

 

The purpose of this Supplement to the Prospectus is to replace the performance tables in the Prospectus and the prior Supplement for the Portfolios listed above.

 

The performance table in the Prospectus for the International Core Equity Portfolio is replaced with the following table:

 

     Periods ending December 31, 2014
  
Annualized Returns (%)
    One Year
     Five Years
     Since
9/15/05
Inception
  
International Core Equity Portfolio
                         
Return Before Taxes
      -5.98 %      5.91 %      4.62 % 
Return After Taxes on Distributions
      -6.67 %      5.24 %      4.05 % 
Return After Taxes on Distributions and Sale of Portfolio Shares
      -2.84 %      4.59 %      3.70 % 
MSCI World ex USA Index (net dividends)
(reflects no deduction for fees, expenses, or taxes on sales)
      -4.32 %      5.21 %      4.11 % 

The date of this Supplement is March 20, 2015
Performance Table Heading rr_PerformanceTableHeading Periods ending December 31, 2014
Annualized Returns (%)
INTERNATIONAL CORE EQUITY PORTFOLIO | INSTITUTIONAL CLASS  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 (5.98%)rr_AverageAnnualReturnYear01
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Five Years rr_AverageAnnualReturnYear05 5.91%rr_AverageAnnualReturnYear05
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Since Inception rr_AverageAnnualReturnSinceInception 4.62%rr_AverageAnnualReturnSinceInception
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Inception Date rr_AverageAnnualReturnInceptionDate Sep. 15, 2005
INTERNATIONAL CORE EQUITY PORTFOLIO | Return After Taxes on Distributions | INSTITUTIONAL CLASS  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 (6.67%)rr_AverageAnnualReturnYear01
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Five Years rr_AverageAnnualReturnYear05 5.24%rr_AverageAnnualReturnYear05
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Inception Date rr_AverageAnnualReturnInceptionDate Sep. 15, 2005
INTERNATIONAL CORE EQUITY PORTFOLIO | Return After Taxes on Distributions and Sale of Portfolio Shares | INSTITUTIONAL CLASS  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 (2.84%)rr_AverageAnnualReturnYear01
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Five Years rr_AverageAnnualReturnYear05 4.59%rr_AverageAnnualReturnYear05
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Since Inception rr_AverageAnnualReturnSinceInception 3.70%rr_AverageAnnualReturnSinceInception
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Inception Date rr_AverageAnnualReturnInceptionDate Sep. 15, 2005
INTERNATIONAL CORE EQUITY PORTFOLIO | MSCI World ex USA Index (net dividends) (reflects no deduction for fees, expenses, or taxes on sales)  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 (4.32%)rr_AverageAnnualReturnYear01
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/ rr_PerformanceMeasureAxis
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Five Years rr_AverageAnnualReturnYear05 5.21%rr_AverageAnnualReturnYear05
/ dei_LegalEntityAxis
= didgi_S000000983Member
/ rr_PerformanceMeasureAxis
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Since Inception rr_AverageAnnualReturnSinceInception 4.11%rr_AverageAnnualReturnSinceInception
/ dei_LegalEntityAxis
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/ rr_PerformanceMeasureAxis
= didgi_MsciWorldExUsaIndexMember
International Vector Equity Portfolio  
Risk/Return: rr_RiskReturnAbstract  
Supplement [Text Block] didgi_SupplementTextBlock

DFA INVESTMENT DIMENSIONS GROUP INC.

 

SUPPLEMENT TO THE PROSPECTUS DATED FEBRUARY 28, 2015

 

INTERNATIONAL VECTOR EQUITY PORTFOLIO

 

INSTITUTIONAL CLASS SHARES

 

The purpose of this Supplement to the Prospectus is to replace the performance tables in the Prospectus and the prior Supplement for the Portfolios listed above.

 

The performance table in the Prospectus for the International Vector Equity Portfolio is replaced with the following table:

 

     Periods ending December 31, 2014
  
Annualized Returns (%)
    One Year
     Five Years
     Since
8/14/08
  Inception  
  
International Vector Equity Portfolio
                         
Return Before Taxes
      -6.27 %      6.18 %      4.34 % 
Return After Taxes on Distributions
      -7.13 %      5.39 %      3.68 % 
Return After Taxes on Distributions and Sale of Portfolio Shares
      -2.94 %      4.83 %      3.39 % 
MSCI World ex USA Index (net dividends)
(reflects no deduction for fees, expenses, or taxes on sales)
      -4.32 %      5.21 %      2.47 % 

The date of this Supplement is March 20, 2015
Performance Table Heading rr_PerformanceTableHeading Periods ending December 31, 2014
Annualized Returns (%)
International Vector Equity Portfolio | International Vector Equity Portfolio Shares  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 (6.27%)rr_AverageAnnualReturnYear01
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Five Years rr_AverageAnnualReturnYear05 6.18%rr_AverageAnnualReturnYear05
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Since Inception rr_AverageAnnualReturnSinceInception 4.34%rr_AverageAnnualReturnSinceInception
/ dei_LegalEntityAxis
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Inception Date rr_AverageAnnualReturnInceptionDate Aug. 14, 2008
International Vector Equity Portfolio | Return After Taxes on Distributions | International Vector Equity Portfolio Shares  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 (7.13%)rr_AverageAnnualReturnYear01
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Five Years rr_AverageAnnualReturnYear05 5.39%rr_AverageAnnualReturnYear05
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Since Inception rr_AverageAnnualReturnSinceInception 3.68%rr_AverageAnnualReturnSinceInception
/ dei_LegalEntityAxis
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Inception Date rr_AverageAnnualReturnInceptionDate Aug. 14, 2008
International Vector Equity Portfolio | Return After Taxes on Distributions and Sale of Portfolio Shares | International Vector Equity Portfolio Shares  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 (2.94%)rr_AverageAnnualReturnYear01
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Five Years rr_AverageAnnualReturnYear05 4.83%rr_AverageAnnualReturnYear05
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Since Inception rr_AverageAnnualReturnSinceInception 3.39%rr_AverageAnnualReturnSinceInception
/ dei_LegalEntityAxis
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= rr_AfterTaxesOnDistributionsAndSalesMember
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Inception Date rr_AverageAnnualReturnInceptionDate Aug. 14, 2008
International Vector Equity Portfolio | MSCI World ex USA Index (net dividends) (reflects no deduction for fees, expenses, or taxes on sales)  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 (4.32%)rr_AverageAnnualReturnYear01
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/ rr_PerformanceMeasureAxis
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Five Years rr_AverageAnnualReturnYear05 5.21%rr_AverageAnnualReturnYear05
/ dei_LegalEntityAxis
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Since Inception rr_AverageAnnualReturnSinceInception 2.47%rr_AverageAnnualReturnSinceInception
/ dei_LegalEntityAxis
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/ rr_PerformanceMeasureAxis
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World ex U.S. Value Portfolio  
Risk/Return: rr_RiskReturnAbstract  
Supplement [Text Block] didgi_SupplementTextBlock

DFA INVESTMENT DIMENSIONS GROUP INC.

 

SUPPLEMENT TO THE PROSPECTUS DATED FEBRUARY 28, 2015

 

WORLD EX U.S. VALUE PORTFOLIO

 

INSTITUTIONAL CLASS SHARES

 

The purpose of this Supplement to the Prospectus is to replace the performance tables in the Prospectus and the prior Supplement for the Portfolios listed above.

 

The performance table in the Prospectus for the World ex U.S. Value Portfolio is replaced with the following table:

 

     Periods ending December 31, 2014
  
Annualized Returns (%)
    One Year
     Since
8/23/10
Inception
  
World ex U.S. Value Portfolio
                 
Return Before Taxes
      -6.19 %      5.03 % 
Return After Taxes on Distributions
      -7.11 %      4.35 % 
Return After Taxes on Distributions and Sale of Portfolio Shares
      -2.86 %      3.93 % 
MSCI All Country World ex USA Index (net dividends)
(reflects no deduction for fees, expenses, or taxes on sales)
      -3.87 %      6.33 % 

The date of this Supplement is March 20, 2015
Performance Table Heading rr_PerformanceTableHeading Periods ending December 31, 2014
Annualized Returns (%)
World ex U.S. Value Portfolio | Institutional Class  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 (6.19%)rr_AverageAnnualReturnYear01
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Since Inception rr_AverageAnnualReturnSinceInception 5.03%rr_AverageAnnualReturnSinceInception
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Inception Date rr_AverageAnnualReturnInceptionDate Aug. 23, 2010
World ex U.S. Value Portfolio | Return After Taxes on Distributions | Institutional Class  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 (7.11%)rr_AverageAnnualReturnYear01
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Since Inception rr_AverageAnnualReturnSinceInception 4.35%rr_AverageAnnualReturnSinceInception
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Inception Date rr_AverageAnnualReturnInceptionDate Aug. 23, 2010
World ex U.S. Value Portfolio | Return After Taxes on Distributions and Sale of Portfolio Shares | Institutional Class  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 (2.86%)rr_AverageAnnualReturnYear01
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Since Inception rr_AverageAnnualReturnSinceInception 3.93%rr_AverageAnnualReturnSinceInception
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Inception Date rr_AverageAnnualReturnInceptionDate Aug. 23, 2010
World ex U.S. Value Portfolio | MSCI All Country World ex USA Index (net dividends) (reflects no deduction for fees, expenses, or taxes on sales)  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 (3.87%)rr_AverageAnnualReturnYear01
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Since Inception rr_AverageAnnualReturnSinceInception 6.33%rr_AverageAnnualReturnSinceInception
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/ rr_PerformanceMeasureAxis
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World ex U.S. Targeted Value Portfolio  
Risk/Return: rr_RiskReturnAbstract  
Supplement [Text Block] didgi_SupplementTextBlock

DFA INVESTMENT DIMENSIONS GROUP INC.

 

SUPPLEMENT TO THE PROSPECTUS DATED FEBRUARY 28, 2015

 

WORLD EX U.S. TARGETED VALUE PORTFOLIO

 

INSTITUTIONAL CLASS SHARES

 

The purpose of this Supplement to the Prospectus is to replace the performance tables in the Prospectus and the prior Supplement for the Portfolios listed above.


The performance table in the Prospectus for the World ex U.S. Targeted Value Portfolio is replaced with the following table:

 

     Periods ending December 31, 2014
  
Annualized Returns (%)
    One Year
     Since
11/01/12
  Inception  
  
World ex U.S. Targeted Value Portfolio
                 
Return Before Taxes
      -4.49 %      10.01 % 
Return After Taxes on Distributions
      -5.08 %      9.12 % 
Return After Taxes on Distributions and Sale of Portfolio Shares
      -2.15 %      7.60 % 
MSCI All Country World ex USA Small Cap Index (net dividends)
(reflects no deduction for fees, expenses, or taxes on sales)
      -4.03 %      8.66 % 

The date of this Supplement is March 20, 2015
Performance Table Heading rr_PerformanceTableHeading Periods ending December 31, 2014
Annualized Returns (%)
World ex U.S. Targeted Value Portfolio | Institutional Class  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 (4.49%)rr_AverageAnnualReturnYear01
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Since Inception rr_AverageAnnualReturnSinceInception 10.01%rr_AverageAnnualReturnSinceInception
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Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2012
World ex U.S. Targeted Value Portfolio | Return After Taxes on Distributions | Institutional Class  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 (5.08%)rr_AverageAnnualReturnYear01
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Since Inception rr_AverageAnnualReturnSinceInception 9.12%rr_AverageAnnualReturnSinceInception
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Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2012
World ex U.S. Targeted Value Portfolio | Return After Taxes on Distributions and Sale of Portfolio Shares | Institutional Class  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 (2.15%)rr_AverageAnnualReturnYear01
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Since Inception rr_AverageAnnualReturnSinceInception 7.60%rr_AverageAnnualReturnSinceInception
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Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2012
World ex U.S. Targeted Value Portfolio | MSCI All Country World ex USA Small Cap Index (net dividends) (reflects no deduction for fees, expenses, or taxes on sales)  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 (4.03%)rr_AverageAnnualReturnYear01
/ dei_LegalEntityAxis
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Since Inception rr_AverageAnnualReturnSinceInception 8.66%rr_AverageAnnualReturnSinceInception
/ dei_LegalEntityAxis
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/ rr_PerformanceMeasureAxis
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World ex U.S. Core Equity Portfolio  
Risk/Return: rr_RiskReturnAbstract  
Supplement [Text Block] didgi_SupplementTextBlock

DFA INVESTMENT DIMENSIONS GROUP INC.

 

SUPPLEMENT TO THE PROSPECTUS DATED FEBRUARY 28, 2015

 

WORLD EX U.S. CORE EQUITY PORTFOLIO

 

INSTITUTIONAL CLASS SHARES

 

The purpose of this Supplement to the Prospectus is to replace the performance tables in the Prospectus and the prior Supplement for the Portfolios listed above.

 

The performance table in the Prospectus for the World ex U.S. Core Equity Portfolio is replaced with the following table:

 

     Periods ending December 31, 2014
  
Annualized Returns (%)
    One Year
     Since
4/09/13
Inception
  
World ex U.S. Core Equity Portfolio
                 
Return Before Taxes
      -4.86 %      3.23 % 
Return After Taxes on Distributions
      -5.39 %      2.46 % 
Return After Taxes on Distributions and Sale of Portfolio Shares
      -2.32 %      2.36 % 
MSCI All Country World ex USA Index (net dividends)
(reflects no deduction for fees, expenses, or taxes on sales)
      -3.87 %      4.50 % 

The date of this Supplement is March 20, 2015
Performance Table Heading rr_PerformanceTableHeading Periods ending December 31, 2014
Annualized Returns (%)
World ex U.S. Core Equity Portfolio | Institutional Class Shares  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 (4.86%)rr_AverageAnnualReturnYear01
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Inception Date rr_AverageAnnualReturnInceptionDate Apr. 09, 2013
World ex U.S. Core Equity Portfolio | Return After Taxes on Distributions | Institutional Class Shares  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 (5.39%)rr_AverageAnnualReturnYear01
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Inception Date rr_AverageAnnualReturnInceptionDate Apr. 09, 2013
World ex U.S. Core Equity Portfolio | Return After Taxes on Distributions and Sale of Portfolio Shares | Institutional Class Shares  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 (2.32%)rr_AverageAnnualReturnYear01
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Since Inception rr_AverageAnnualReturnSinceInception 2.36%rr_AverageAnnualReturnSinceInception
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Inception Date rr_AverageAnnualReturnInceptionDate Apr. 09, 2013
World ex U.S. Core Equity Portfolio | MSCI All Country World ex USA Index (net dividends) (reflects no deduction for fees, expenses, or taxes on sales)  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 (3.87%)rr_AverageAnnualReturnYear01
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Since Inception rr_AverageAnnualReturnSinceInception 4.50%rr_AverageAnnualReturnSinceInception
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World Core Equity Portfolio  
Risk/Return: rr_RiskReturnAbstract  
Supplement [Text Block] didgi_SupplementTextBlock

DFA INVESTMENT DIMENSIONS GROUP INC.

 

SUPPLEMENT TO THE PROSPECTUS DATED FEBRUARY 28, 2015

 

WORLD CORE EQUITY PORTFOLIO
(formerly, Dimensional Retirement Equity Fund II)

 

INSTITUTIONAL CLASS SHARES

 

The purpose of this Supplement to the Prospectus is to replace the performance tables in the Prospectus and the prior Supplement for the Portfolios listed above.

 

The performance table in the Prospectus for the World Core Equity Portfolio is replaced with the following table:

 

     Periods ending December 31, 2014
  
Annualized Returns (%)
    One Year
     Since
3/07/12
  Inception  
  
World Core Equity Portfolio
                 
Return Before Taxes
      2.48 %      13.04 % 
Return After Taxes on Distributions
      1.90 %      12.31 % 
Return After Taxes on Distributions and Sale of Portfolio Shares
      1.81 %      10.09 % 
MSCI All Country World Index (net dividends)
(reflects no deduction for fees, expenses, or taxes on sales)
      4.16 %      11.69 % 

The date of this Supplement is March 20, 2015
Performance Table Heading rr_PerformanceTableHeading Periods ending December 31, 2014
Annualized Returns (%)
World Core Equity Portfolio | Institutional Class  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 2.48%rr_AverageAnnualReturnYear01
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Since Inception rr_AverageAnnualReturnSinceInception 13.04%rr_AverageAnnualReturnSinceInception
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Inception Date rr_AverageAnnualReturnInceptionDate Mar. 07, 2012
World Core Equity Portfolio | Return After Taxes on Distributions | Institutional Class  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 1.90%rr_AverageAnnualReturnYear01
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Since Inception rr_AverageAnnualReturnSinceInception 12.31%rr_AverageAnnualReturnSinceInception
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Inception Date rr_AverageAnnualReturnInceptionDate Mar. 07, 2012
World Core Equity Portfolio | Return After Taxes on Distributions and Sale of Portfolio Shares | Institutional Class  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 1.81%rr_AverageAnnualReturnYear01
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Since Inception rr_AverageAnnualReturnSinceInception 10.09%rr_AverageAnnualReturnSinceInception
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Inception Date rr_AverageAnnualReturnInceptionDate Mar. 07, 2012
World Core Equity Portfolio | MSCI All Country World Index (net dividends) (reflects no deduction for fees, expenses, or taxes on sales)  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 4.16%rr_AverageAnnualReturnYear01
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/ rr_PerformanceMeasureAxis
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Since Inception rr_AverageAnnualReturnSinceInception 11.69%rr_AverageAnnualReturnSinceInception
/ dei_LegalEntityAxis
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Selectively Hedged Global Equity Portfolio  
Risk/Return: rr_RiskReturnAbstract  
Supplement [Text Block] didgi_SupplementTextBlock

DFA INVESTMENT DIMENSIONS GROUP INC.

 

SUPPLEMENT TO THE PROSPECTUS DATED FEBRUARY 28, 2015

 

SELECTIVELY HEDGED GLOBAL EQUITY PORTFOLIO

 

INSTITUTIONAL CLASS SHARES

 

The purpose of this Supplement to the Prospectus is to replace the performance tables in the Prospectus and the prior Supplement for the Portfolios listed above.

 

The performance table in the Prospectus for the Selectively Hedged Global Equity Portfolio is replaced with the following table:

 

     Periods ending December 31, 2014
  
Annualized Returns (%)
    One Year  
     Since
11/14/11
  Inception  
  
Selectively Hedged Global Equity Portfolio
                 
Return Before Taxes
      3.91 %      14.28 % 
Return After Taxes on Distributions
      2.42 %      13.13 % 
Return After Taxes on Distributions and Sale of Portfolio Shares
      2.74 %      10.94 % 
MSCI All Country World Index (net dividends)
(reflects no deduction for fees, expenses, or taxes on sales)
      4.16 %      12.95 % 

The date of this Supplement is March 20, 2015
Performance Table Heading rr_PerformanceTableHeading Periods ending December 31, 2014
Annualized Returns (%)
Selectively Hedged Global Equity Portfolio | Institutional Class  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 3.91%rr_AverageAnnualReturnYear01
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Since Inception rr_AverageAnnualReturnSinceInception 14.28%rr_AverageAnnualReturnSinceInception
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Inception Date rr_AverageAnnualReturnInceptionDate Nov. 14, 2011
Selectively Hedged Global Equity Portfolio | Return After Taxes on Distributions | Institutional Class  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 2.42%rr_AverageAnnualReturnYear01
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Since Inception rr_AverageAnnualReturnSinceInception 13.13%rr_AverageAnnualReturnSinceInception
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Inception Date rr_AverageAnnualReturnInceptionDate Nov. 14, 2011
Selectively Hedged Global Equity Portfolio | Return After Taxes on Distributions and Sale of Portfolio Shares | Institutional Class  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 2.74%rr_AverageAnnualReturnYear01
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Since Inception rr_AverageAnnualReturnSinceInception 10.94%rr_AverageAnnualReturnSinceInception
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Inception Date rr_AverageAnnualReturnInceptionDate Nov. 14, 2011
Selectively Hedged Global Equity Portfolio | MSCI All Country World Index (net dividends) (reflects no deduction for fees, expenses, or taxes on sales)  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 4.16%rr_AverageAnnualReturnYear01
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Since Inception rr_AverageAnnualReturnSinceInception 12.95%rr_AverageAnnualReturnSinceInception
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