XML 18 R2.htm IDEA: XBRL DOCUMENT v3.26.1
Shareholder Report
 6 Months Ended
Apr. 30, 2026
USD ($)
$ / shares
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name DFA INVESTMENT DIMENSIONS GROUP INC.
Entity Central Index Key 0000355437
Entity Investment Company Type N-1A
Document Period End Date Apr. 30, 2026
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Institutional  
Shareholder Report [Line Items]  
Fund Name U.S. Micro Cap Portfolio
Class Name Institutional
Trading Symbol DFSCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the U.S. Micro Cap Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$22
0.41%1,2
[1],[2]
Expenses Paid, Amount $ 22
Expense Ratio, Percent 0.41% [1],[2]
Net Assets $ 7,469,134,287
Holdings Count | $ / shares 1,757
Investment Company Portfolio Turnover 7.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$7,469,134,287
Number of Holdings
1,757
Portfolio Turnover Rate
7%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
Argan, Inc.
1.1%
TTM Technologies, Inc.
0.7%
Plexus Corp.
0.6%
Powell Industries, Inc.
0.6%
First BanCorp
0.4%
Enova International, Inc.
0.4%
Covista, Inc.
0.4%
Viavi Solutions, Inc.
0.4%
AAR Corp.
0.4%
Enpro, Inc.
0.4%
Sector Allocation
(% of Total Investments) †
Financials
22.4%
Industrials
17.9%
Information Technology
12.8%
Consumer Discretionary
12.4%
Health Care
11.9%
Energy
7.3%
Materials
5.2%
Consumer Staples
3.6%
Communication Services
2.9%
Utilities
2.4%
Real Estate
1.2%
[3]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
ETF  
Shareholder Report [Line Items]  
Fund Name U.S. Micro Cap Portfolio
Class Name ETF
Trading Symbol DFMC
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the U.S. Micro Cap Portfolio (the “Portfolio”) for the period of March 19, 2026 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
ETF
$51
0.41%2,3
[4],[5],[6]
Expenses Paid, Amount $ 5 [4]
Expense Ratio, Percent 0.41% [5],[6]
Net Assets $ 7,469,134,287
Holdings Count | $ / shares 1,757
Investment Company Portfolio Turnover 7.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$7,469,134,287
Number of Holdings
1,757
Portfolio Turnover Rate
7%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
Argan, Inc.
1.1%
TTM Technologies, Inc.
0.7%
Plexus Corp.
0.6%
Powell Industries, Inc.
0.6%
First BanCorp
0.4%
Enova International, Inc.
0.4%
Covista, Inc.
0.4%
Viavi Solutions, Inc.
0.4%
AAR Corp.
0.4%
Enpro, Inc.
0.4%
Sector Allocation
(% of Total Investments) †
Financials
22.4%
Industrials
17.9%
Information Technology
12.8%
Consumer Discretionary
12.4%
Health Care
11.9%
Energy
7.3%
Materials
5.2%
Consumer Staples
3.6%
Communication Services
2.9%
Utilities
2.4%
Real Estate
1.2%
[7]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name DFA Real Estate Securities Portfolio
Class Name Institutional
Trading Symbol DFREX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the DFA Real Estate Securities Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$10
0.18%1,2
[8],[9]
Expenses Paid, Amount $ 10
Expense Ratio, Percent 0.18% [8],[9]
Net Assets $ 6,951,190,448
Holdings Count | $ / shares 131
Investment Company Portfolio Turnover 3.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$6,951,190,448
Number of Holdings
131
Portfolio Turnover Rate
3%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
Welltower, Inc.
7.6%
Prologis, Inc.
7.0%
Equinix, Inc.
5.5%
Simon Property Group, Inc.
4.7%
American Tower Corp.
4.5%
Realty Income Corp.
4.5%
Digital Realty Trust, Inc.
4.5%
Public Storage
3.7%
Ventas, Inc.
3.3%
Crown Castle, Inc.
3.0%
Sector Allocation
(% of Total Investments) †
Real Estate
100.0%
[10]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name DFA International Small Cap Value Portfolio
Class Name Institutional
Trading Symbol DISVX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the DFA International Small Cap Value Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$23
0.43%1
[11]
Expenses Paid, Amount $ 23
Expense Ratio, Percent 0.43% [11]
Net Assets $ 14,214,707,253
Holdings Count | $ / shares 1,896
Investment Company Portfolio Turnover 4.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$14,214,707,253
Number of Holdings
1,896
Portfolio Turnover Rate
4%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
Jyske Bank AS
1.1%
Telecom Italia SpA
1.0%
SBM Offshore NV
1.0%
AL Sydbank
0.9%
Lion Finance Group PLC
0.9%
Bankinter SA
0.9%
Ackermans & van Haaren NV
0.7%
Buzzi SpA
0.6%
Swiss Prime Site AG
0.6%
Aurubis AG
0.6%
Top Countries
(% of Total Investments) †
Japan
28.8%
Canada
11.2%
United Kingdom
10.3%
Australia
7.1%
Switzerland
6.1%
Italy
4.9%
France
4.3%
Germany
4.1%
Denmark
3.7%
Spain
3.0%
[12]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name Enhanced U.S. Large Company Portfolio
Class Name Institutional
Trading Symbol DFELX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Enhanced U.S. Large Company Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$8
0.15%1,2
[13],[14]
Expenses Paid, Amount $ 8
Expense Ratio, Percent 0.15% [13],[14]
Net Assets $ 215,363,200
Holdings Count | $ / shares 163
Investment Company Portfolio Turnover 41.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$215,363,200
Number of Holdings
163
Portfolio Turnover Rate
41%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
U.S. Treasury Bills    3.666% due 05/26/26
3.3%
U.S. Treasury Bills    3.685% due 05/14/26
3.1%
New Zealand Local Government Funding Agency Bonds (New Zealand) 2.250% due 05/15/28
3.0%
CDP Financial, Inc. (Canada) 3.700% due 03/08/28
2.8%
New Zealand Government Bonds (New Zealand) 0.250% due 05/15/28
2.7%
U.S. Treasury Notes    3.125% due 08/31/27
2.6%
U.S. Treasury Notes    3.500% due 10/31/27
2.5%
Bank of Montreal (Canada) 3.190% due 03/01/28
2.1%
U.S. Treasury Bills    3.696% due 07/16/26
2.1%
Province of Ontario (Canada) 3.400% due 09/08/28
1.9%
Security Type
(% of Total Investments) †
Bonds
75.2%
U.S. Treasury Obligations
14.9%
Commercial Paper
9.9%
[15]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name Emerging Markets Portfolio
Class Name Institutional
Trading Symbol DFEMX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Emerging Markets Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$18
0.34%1,2,3
[16],[17],[18]
Expenses Paid, Amount $ 18
Expense Ratio, Percent 0.34% [16],[17],[18]
Net Assets $ 7,944,009,883
Holdings Count | $ / shares 2,154
Investment Company Portfolio Turnover 6.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$7,944,009,883
Number of Holdings
2,154
Portfolio Turnover Rate
6%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
Taiwan Semiconductor Manufacturing Co. Ltd.
12.4%
Samsung Electronics Co. Ltd.
5.9%
SK Hynix, Inc.
3.9%
Tencent Holdings Ltd.
2.1%
Delta Electronics, Inc.
0.8%
Alibaba Group Holding Ltd. (9988 HK)
0.8%
Alibaba Group Holding Ltd. (BABA US)
0.8%
Petroleo Brasileiro SA - Petrobras
0.8%
MediaTek, Inc.
0.8%
China Construction Bank Corp. H
0.7%
Top Countries
(% of Total Investments) †
Taiwan
26.7%
China
20.7%
South Korea
19.0%
India
12.9%
Brazil
4.1%
South Africa
3.0%
Saudi Arabia
2.5%
Mexico
1.7%
Malaysia
1.3%
United Arab Emirates
1.3%
[19]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name Emerging Markets Value Portfolio
Class Name Institutional
Trading Symbol DFEVX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Emerging Markets Value Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$24
0.44%1,2,3
[20],[21],[22]
Expenses Paid, Amount $ 24
Expense Ratio, Percent 0.44% [20],[21],[22]
Net Assets $ 14,008,901,053
Holdings Count | $ / shares 3,575
Investment Company Portfolio Turnover 2.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$14,008,901,053
Number of Holdings
3,575
Portfolio Turnover Rate
2%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
Samsung Electronics Co. Ltd.
4.7%
Alibaba Group Holding Ltd.
2.4%
Reliance Industries Ltd.
2.3%
China Construction Bank Corp. H
2.3%
Hon Hai Precision Industry Co. Ltd.
2.0%
ASE Technology Holding Co. Ltd.
1.5%
KB Financial Group, Inc.
1.3%
Hyundai Motor Co.
1.2%
Industrial & Commercial Bank of China Ltd. H
1.1%
Ping An Insurance Group Co. of China Ltd. H
1.1%
Top Countries
(% of Total Investments)  †
China
24.5%
Taiwan
24.0%
South Korea
17.2%
India
13.5%
Brazil
3.3%
South Africa
2.8%
Saudi Arabia
2.5%
Mexico
2.4%
Poland
1.4%
Malaysia
1.4%
[23]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name Japanese Small Company Portfolio
Class Name Institutional
Trading Symbol DFJSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Japanese Small Company Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$21
0.40%1,2,3
[24],[25],[26]
Expenses Paid, Amount $ 21
Expense Ratio, Percent 0.40% [24],[25],[26]
Net Assets $ 205,701,832
Holdings Count | $ / shares 1,583
Investment Company Portfolio Turnover 12.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$205,701,832
Number of Holdings
1,583
Portfolio Turnover Rate
12%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
Meiko Electronics Co. Ltd.
0.7%
Taiyo Yuden Co. Ltd.
0.6%
SUMCO Corp.
0.5%
Mitsubishi Materials Corp.
0.5%
Nippon Electric Glass Co. Ltd.
0.5%
Nikkon Holdings Co. Ltd.
0.5%
GS Yuasa Corp.
0.5%
JGC Holdings Corp.
0.5%
EXEO Group, Inc.
0.5%
Penta-Ocean Construction Co. Ltd.
0.5%
Sector Allocation
(% of Total Investments)  †
Industrials
30.2%
Consumer Discretionary
15.1%
Information Technology
13.4%
Materials
13.0%
Financials
11.7%
Consumer Staples
7.4%
Health Care
3.3%
Communication Services
2.2%
Utilities
1.4%
Real Estate
1.3%
Energy
1.0%
[27]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name United Kingdom Small Company Portfolio
Class Name Institutional
Trading Symbol DFUKX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the United Kingdom Small Company Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$26
0.50%1,2,3
[28],[29],[30]
Expenses Paid, Amount $ 26
Expense Ratio, Percent 0.50% [28],[29],[30]
Net Assets $ 23,267,715
Holdings Count | $ / shares 295
Investment Company Portfolio Turnover 7.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$23,267,715
Number of Holdings
295
Portfolio Turnover Rate
7%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
Lion Finance Group PLC
2.2%
IG Group Holdings PLC
2.0%
Games Workshop Group PLC
2.0%
Beazley PLC
1.9%
Hiscox Ltd.
1.9%
Plus500 Ltd.
1.8%
Babcock International Group PLC
1.6%
Aberdeen Group PLC
1.5%
Balfour Beatty PLC
1.5%
Howden Joinery Group PLC
1.5%
Sector Allocation
(% of Total Investments)  †
Financials
24.4%
Industrials
22.9%
Consumer Discretionary
20.9%
Materials
9.0%
Communication Services
5.3%
Consumer Staples
4.1%
Energy
3.9%
Information Technology
3.2%
Health Care
2.5%
Utilities
2.5%
Real Estate
1.3%
[31]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name Continental Small Company Portfolio
Class Name Institutional
Trading Symbol DFCSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Continental Small Company Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$21
0.41%1,2,3
[32],[33],[34]
Expenses Paid, Amount $ 21
Expense Ratio, Percent 0.41% [32],[33],[34]
Net Assets $ 120,786,967
Holdings Count | $ / shares 1,174
Investment Company Portfolio Turnover 10.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$120,786,967
Number of Holdings
1,174
Portfolio Turnover Rate
10%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
BAWAG Group AG
1.2%
PSP Swiss Property AG
0.9%
Swiss Prime Site AG
0.9%
Rexel SA
0.8%
Helvetia Baloise Holding AG
0.8%
Ackermans & van Haaren NV
0.8%
Orion OYJ B
0.7%
Belimo Holding AG
0.7%
Ringkjoebing Landbobank AS
0.7%
Gaztransport Et Technigaz SA
0.7%
Top Countries
(% of Total Investments) †
Switzerland
19.2%
Germany
15.8%
France
13.1%
Italy
9.1%
Sweden
6.0%
Denmark
6.0%
Finland
5.9%
Spain
5.7%
Netherlands
5.2%
Austria
4.1%
[35]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name Asia Pacific Small Company Portfolio
Class Name Institutional
Trading Symbol DFRSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Asia Pacific Small Company Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$21
0.41%1,2,3
[36],[37],[38]
Expenses Paid, Amount $ 21
Expense Ratio, Percent 0.41% [36],[37],[38]
Net Assets $ 193,874,039
Holdings Count | $ / shares 661
Investment Company Portfolio Turnover 13.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$193,874,039
Number of Holdings
661
Portfolio Turnover Rate
13%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
ASMPT Ltd.
1.7%
Dyno Nobel Ltd.
1.3%
Regis Resources Ltd.
1.3%
Downer EDI Ltd.
1.2%
Paladin Energy Ltd.
1.1%
Vault Minerals Ltd.
1.1%
Seatrium Ltd.
1.1%
Ventia Services Group Pty. Ltd.
1.1%
Cleanaway Waste Management Ltd.
1.1%
Bank of Queensland Ltd.
1.0%
Top Countries
(% of Total Investments) †
Australia
64.1%
Hong Kong
18.9%
Singapore
14.6%
New Zealand
2.4%
[39]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name International Small Company Portfolio
Class Name Institutional
Trading Symbol DFISX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the International Small Company Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$20
0.38%1
[40]
Expenses Paid, Amount $ 20
Expense Ratio, Percent 0.38% [40]
Net Assets $ 15,775,889,320
Holdings Count | $ / shares 6
Investment Company Portfolio Turnover 11.00% [41]
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$15,775,889,320
Number of Holdings
6
Portfolio Turnover Rate
11%*
[41]
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Portfolio Allocation
(% of Total Investments) †
The Continental Small Company Series
41.5%
The Japanese Small Company Series
22.6%
The Canadian Small Company Series
14.9%
The United Kingdom Small Company Series
11.1%
The Asia Pacific Small Company Series
9.9%
[42]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name U.S. Targeted Value Portfolio
Class Name Institutional
Trading Symbol DFFVX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the U.S. Targeted Value Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$16
0.29%1,2
[43],[44]
Expenses Paid, Amount $ 16
Expense Ratio, Percent 0.29% [43],[44]
Net Assets $ 15,833,819,238
Holdings Count | $ / shares 1,183
Investment Company Portfolio Turnover 7.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$15,833,819,238
Number of Holdings
1,183
Portfolio Turnover Rate
7%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
Permian Resources Corp. A
0.9%
WESCO International, Inc.
0.8%
Amkor Technology, Inc.
0.8%
CF Industries Holdings, Inc.
0.8%
TD SYNNEX Corp.
0.7%
Ovintiv, Inc.
0.7%
Viatris, Inc.
0.7%
APA Corp.
0.7%
Akamai Technologies, Inc.
0.7%
Toll Brothers, Inc.
0.7%
Sector Allocation
(% of Total Investments) †
Financials
28.0%
Industrials
17.1%
Consumer Discretionary
13.2%
Energy
11.6%
Information Technology
8.0%
Materials
6.9%
Consumer Staples
6.3%
Health Care
5.9%
Communication Services
1.8%
Real Estate
0.8%
Utilities
0.4%
[45]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name U.S. Small Cap Portfolio
Class Name Institutional
Trading Symbol DFSTX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the U.S. Small Cap Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$14
0.27%1,2
[46],[47]
Expenses Paid, Amount $ 14
Expense Ratio, Percent 0.27% [46],[47]
Net Assets $ 18,923,798,109
Holdings Count | $ / shares 2,053
Investment Company Portfolio Turnover 4.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$18,923,798,109
Number of Holdings
2,053
Portfolio Turnover Rate
4%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
IES Holdings, Inc.
0.6%
TTM Technologies, Inc.
0.5%
Powell Industries, Inc.
0.4%
Sterling Infrastructure, Inc.
0.4%
Sanmina Corp.
0.3%
Advanced Energy Industries, Inc.
0.3%
Argan, Inc.
0.3%
Element Solutions, Inc.
0.3%
Mueller Industries, Inc.
0.3%
Amkor Technology, Inc.
0.3%
Sector Allocation
(% of Total Investments) †
Industrials
21.6%
Financials
20.6%
Consumer Discretionary
13.2%
Information Technology
12.7%
Health Care
10.3%
Energy
6.3%
Materials
5.4%
Consumer Staples
3.8%
Utilities
2.9%
Communication Services
2.5%
Real Estate
0.7%
[48]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name Emerging Markets Core Equity 2 Portfolio
Class Name Institutional
Trading Symbol DFCEX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Emerging Markets Core Equity 2 Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$20
0.38%1
[49]
Expenses Paid, Amount $ 20
Expense Ratio, Percent 0.38% [49]
Net Assets $ 37,832,959,957
Holdings Count | $ / shares 7,634
Investment Company Portfolio Turnover 2.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$37,832,959,957
Number of Holdings
7,634
Portfolio Turnover Rate
2%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
Taiwan Semiconductor Manufacturing Co. Ltd. (2330 TT)
7.4%
Samsung Electronics Co. Ltd.
4.3%
SK Hynix, Inc.
2.3%
Taiwan Semiconductor Manufacturing Co. Ltd. (TSM US)
2.3%
Tencent Holdings Ltd.
1.8%
Alibaba Group Holding Ltd.
1.0%
Petroleo Brasileiro SA - Petrobras
0.6%
MediaTek, Inc.
0.6%
China Construction Bank Corp. H
0.6%
Ping An Insurance Group Co. of China Ltd. H
0.5%
Top Countries
(% of Total Investments) †
Taiwan
24.4%
China
23.2%
South Korea
17.0%
India
13.9%
Brazil
3.9%
South Africa
3.1%
Saudi Arabia
2.6%
Mexico
2.1%
Malaysia
1.3%
United Arab Emirates
1.3%
[50]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name U.S. Core Equity 1 Portfolio
Class Name Institutional
Trading Symbol DFEOX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the U.S. Core Equity 1 Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$8
0.15%1
[51]
Expenses Paid, Amount $ 8
Expense Ratio, Percent 0.15% [51]
Net Assets $ 40,194,060,995
Holdings Count | $ / shares 2,352
Investment Company Portfolio Turnover 1.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$40,194,060,995
Number of Holdings
2,352
Portfolio Turnover Rate
1%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
NVIDIA Corp.
6.0%
Apple, Inc.
5.1%
Microsoft Corp.
3.5%
Amazon.com, Inc.
3.0%
Alphabet, Inc. A
2.5%
Alphabet, Inc. C
2.2%
Broadcom, Inc.
1.8%
Meta Platforms, Inc. A
1.7%
JPMorgan Chase & Co.
1.6%
Exxon Mobil Corp.
1.2%
Sector Allocation
(% of Total Investments) †
Information Technology
28.4%
Financials
15.0%
Industrials
13.0%
Consumer Discretionary
9.9%
Communication Services
9.1%
Health Care
8.1%
Energy
5.5%
Consumer Staples
5.3%
Materials
3.0%
Utilities
2.5%
Real Estate
0.2%
[52]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name U.S. Core Equity 2 Portfolio
Class Name Institutional
Trading Symbol DFQTX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the U.S. Core Equity 2 Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$9
0.18%1,2
[53],[54]
Expenses Paid, Amount $ 9
Expense Ratio, Percent 0.18% [53],[54]
Net Assets $ 37,750,198,154
Holdings Count | $ / shares 2,439
Investment Company Portfolio Turnover 2.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$37,750,198,154
Number of Holdings
2,439
Portfolio Turnover Rate
2%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
NVIDIA Corp.
5.9%
Apple, Inc.
4.9%
Microsoft Corp.
3.8%
Amazon.com, Inc.
2.3%
Alphabet, Inc. A
2.0%
Meta Platforms, Inc. A
2.0%
JPMorgan Chase & Co.
1.5%
Alphabet, Inc. C
1.4%
Broadcom, Inc.
1.3%
Exxon Mobil Corp.
1.3%
Sector Allocation
(% of Total Investments) †
Information Technology
27.5%
Financials
16.2%
Industrials
14.2%
Consumer Discretionary
9.0%
Health Care
8.2%
Communication Services
7.8%
Energy
6.2%
Consumer Staples
5.3%
Materials
3.3%
Utilities
2.0%
Real Estate
0.3%
[55]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name Emerging Markets Small Cap Portfolio
Class Name Institutional
Trading Symbol DEMSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Emerging Markets Small Cap Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$31
0.60%1,2,3
[56],[57],[58]
Expenses Paid, Amount $ 31
Expense Ratio, Percent 0.60% [56],[57],[58]
Net Assets $ 3,873,715,930
Holdings Count | $ / shares 4,711
Investment Company Portfolio Turnover 5.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$3,873,715,930
Number of Holdings
4,711
Portfolio Turnover Rate
5%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
Macronix International Co. Ltd.
0.6%
3SBio, Inc.
0.4%
Grupa Kety SA
0.4%
Kingboard Laminates Holdings Ltd.
0.4%
China Gold International Resources Corp. Ltd.
0.4%
GDS Holdings Ltd. A
0.4%
Industrias CH SAB de CV
0.4%
Li Ning Co. Ltd.
0.4%
Harmony Gold Mining Co. Ltd.
0.4%
ADATA Technology Co. Ltd.
0.3%
Top Countries
(% of Total Investments)  †
China
26.8%
Taiwan
21.0%
India
16.2%
South Korea
12.9%
Brazil
3.5%
South Africa
2.9%
Mexico
2.9%
Saudi Arabia
2.3%
Poland
1.8%
Malaysia
1.4%
[59]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name U.S. Vector Equity Portfolio
Class Name Institutional
Trading Symbol DFVEX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the U.S. Vector Equity Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$12
0.23%1
[60]
Expenses Paid, Amount $ 12
Expense Ratio, Percent 0.23% [60]
Net Assets $ 5,315,596,966
Holdings Count | $ / shares 1,997
Investment Company Portfolio Turnover 3.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$5,315,596,966
Number of Holdings
1,997
Portfolio Turnover Rate
3%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
NVIDIA Corp.
4.8%
Microsoft Corp.
4.4%
Apple, Inc.
4.3%
Amazon.com, Inc.
2.7%
Meta Platforms, Inc. A
1.9%
Alphabet, Inc. A
1.8%
Alphabet, Inc. C
1.2%
JPMorgan Chase & Co.
0.8%
Exxon Mobil Corp.
0.7%
Eli Lilly & Co.
0.7%
Sector Allocation
(% of Total Investments) †
Information Technology
23.0%
Financials
18.4%
Industrials
15.0%
Consumer Discretionary
10.8%
Health Care
7.9%
Communication Services
7.7%
Energy
7.2%
Consumer Staples
4.8%
Materials
4.4%
Utilities
0.5%
Real Estate
0.3%
[61]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name International Core Equity 2 Portfolio
Class Name Institutional
Trading Symbol DFIEX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the International Core Equity 2 Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$12
0.23%1
[62]
Expenses Paid, Amount $ 12
Expense Ratio, Percent 0.23% [62]
Net Assets $ 41,862,364,165
Holdings Count | $ / shares 4,831
Investment Company Portfolio Turnover 5.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$41,862,364,165
Number of Holdings
4,831
Portfolio Turnover Rate
5%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
TotalEnergies SE
0.9%
Shell PLC
0.8%
Novartis AG
0.8%
ASML Holding NV
0.6%
Roche Holding AG
0.6%
Toyota Motor Corp.
0.6%
Royal Bank of Canada
0.5%
HSBC Holdings PLC
0.5%
SoftBank Group Corp.
0.5%
Nestle SA
0.5%
Top Countries
(% of Total Investments) †
Japan
22.5%
Canada
12.3%
United Kingdom
11.6%
Switzerland
7.5%
Germany
7.4%
France
7.4%
Australia
5.9%
Italy
3.6%
Netherlands
3.6%
Spain
3.1%
[63]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name Large Cap International Portfolio
Class Name Institutional
Trading Symbol DFALX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Large Cap International Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$9
0.17%1
[64]
Expenses Paid, Amount $ 9
Expense Ratio, Percent 0.17% [64]
Net Assets $ 8,027,374,096
Holdings Count | $ / shares 1,144
Investment Company Portfolio Turnover 4.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$8,027,374,096
Number of Holdings
1,144
Portfolio Turnover Rate
4%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
ASML Holding NV
1.3%
Roche Holding AG
1.2%
Shell PLC
1.2%
TotalEnergies SE
1.0%
Nestle SA
1.0%
Toyota Motor Corp.
0.7%
SoftBank Group Corp.
0.7%
Novartis AG
0.6%
Banco Santander SA
0.6%
BHP Group Ltd.
0.6%
Top Countries
(% of Total Investments) †
Japan
22.1%
United Kingdom
12.8%
Canada
11.7%
France
8.3%
Switzerland
7.7%
Germany
7.6%
Australia
6.4%
Netherlands
4.3%
Spain
3.1%
Italy
2.8%
[65]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name U.S. Small Cap Value Portfolio
Class Name Institutional
Trading Symbol DFSVX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the U.S. Small Cap Value Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$17
0.31%1
[66]
Expenses Paid, Amount $ 17
Expense Ratio, Percent 0.31% [66]
Net Assets $ 18,729,517,924
Holdings Count | $ / shares 1,037
Investment Company Portfolio Turnover 6.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$18,729,517,924
Number of Holdings
1,037
Portfolio Turnover Rate
6%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
BorgWarner, Inc.
0.9%
HF Sinclair Corp.
0.9%
Elanco Animal Health, Inc.
0.8%
Ovintiv, Inc.
0.8%
APA Corp.
0.8%
Avnet, Inc.
0.8%
Invesco Ltd.
0.7%
Knight-Swift Transportation Holdings, Inc.
0.7%
Webster Financial Corp.
0.7%
Arrow Electronics, Inc.
0.7%
Sector Allocation
(% of Total Investments) †
Financials
27.4%
Industrials
15.5%
Consumer Discretionary
14.1%
Energy
13.4%
Information Technology
7.2%
Health Care
6.6%
Materials
6.2%
Consumer Staples
5.6%
Communication Services
2.7%
Real Estate
0.7%
Utilities
0.6%
[67]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name U.S. Large Cap Value Portfolio
Class Name Institutional
Trading Symbol DFLVX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the U.S. Large Cap Value Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$12
0.22%1,2,3
[68],[69],[70]
Expenses Paid, Amount $ 12
Expense Ratio, Percent 0.22% [68],[69],[70]
Net Assets $ 24,614,050,132
Holdings Count | $ / shares 316
Investment Company Portfolio Turnover 6.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$24,614,050,132
Number of Holdings
316
Portfolio Turnover Rate
6%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
JPMorgan Chase & Co.
4.5%
Amazon.com, Inc.
3.5%
Exxon Mobil Corp.
3.3%
Micron Technology, Inc.
2.6%
Johnson & Johnson
2.5%
Cisco Systems, Inc.
2.5%
Chevron Corp.
2.1%
Berkshire Hathaway, Inc. B
1.8%
Goldman Sachs Group, Inc.
1.3%
UnitedHealth Group, Inc.
1.2%
Sector Allocation
(% of Total Investments) †
Financials
22.2%
Industrials
14.3%
Energy
14.0%
Health Care
13.5%
Information Technology
12.9%
Consumer Discretionary
7.3%
Materials
6.5%
Communication Services
4.8%
Consumer Staples
4.1%
Real Estate
0.4%
[71]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name DFA International Real Estate Securities Portfolio
Class Name Institutional
Trading Symbol DFITX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the DFA International Real Estate Securities Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$14
0.27%1
[72]
Expenses Paid, Amount $ 14
Expense Ratio, Percent 0.27% [72]
Net Assets $ 3,281,516,185
Holdings Count | $ / shares 323
Investment Company Portfolio Turnover 2.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$3,281,516,185
Number of Holdings
323
Portfolio Turnover Rate
2%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
Goodman Group
9.1%
Unibail-Rodamco-Westfield
3.0%
Scentre Group
2.9%
Link REIT
2.7%
Segro PLC
2.6%
CapitaLand Integrated Commercial Trust
2.4%
Klepierre SA
1.7%
CapitaLand Ascendas REIT
1.6%
Stockland
1.5%
Vicinity Ltd.
1.5%
Top Countries
(% of Total Investments) †
Australia
23.8%
Japan
19.9%
United Kingdom
12.5%
Singapore
11.1%
France
7.3%
Canada
4.4%
Belgium
3.5%
Mexico
3.4%
Hong Kong
3.3%
South Africa
2.9%
[73]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name DFA Global Real Estate Securities Portfolio
Class Name Institutional
Trading Symbol DFGEX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the DFA Global Real Estate Securities Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$12
0.22%1,2
[74],[75]
Expenses Paid, Amount $ 12
Expense Ratio, Percent 0.22% [74],[75]
Net Assets $ 7,622,239,310
Holdings Count | $ / shares 130
Investment Company Portfolio Turnover 3.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$7,622,239,310
Number of Holdings
130
Portfolio Turnover Rate
3%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Portfolio Allocation
(% of Total Investments) †
DFA International Real Estate Securities Portfolio
26.4%
Welltower, Inc.
7.3%
Prologis, Inc.
6.7%
Equinix, Inc.
5.4%
American Tower Corp.
4.3%
Digital Realty Trust, Inc.
3.5%
Simon Property Group, Inc.
3.4%
Realty Income Corp.
3.0%
Public Storage
2.4%
Ventas, Inc.
2.1%
[76]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name International Vector Equity Portfolio
Class Name Institutional
Trading Symbol DFVQX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the International Vector Equity Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$16
0.29%1
[77]
Expenses Paid, Amount $ 16
Expense Ratio, Percent 0.29% [77]
Net Assets $ 4,349,026,614
Holdings Count | $ / shares 3,784
Investment Company Portfolio Turnover 3.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$4,349,026,614
Number of Holdings
3,784
Portfolio Turnover Rate
3%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
TotalEnergies SE
0.8%
ASML Holding NV
0.8%
Fujikura Ltd.
0.7%
BHP Group Ltd.
0.7%
Orange SA
0.6%
Novartis AG
0.6%
Engie SA
0.6%
Deutsche Telekom AG
0.5%
Roche Holding AG
0.5%
BASF SE
0.5%
Top Countries
(% of Total Investments) †
Japan
24.2%
Canada
11.7%
United Kingdom
9.9%
Germany
8.4%
Switzerland
7.2%
France
6.8%
Australia
6.2%
Netherlands
3.4%
Italy
3.2%
Spain
3.1%
[78]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name World ex U.S. Value Portfolio
Class Name Institutional
Trading Symbol DFWVX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the World ex U.S. Value Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$20
0.36%1,2
[79],[80]
Expenses Paid, Amount $ 20
Expense Ratio, Percent 0.36% [79],[80]
Net Assets $ 599,663,263
Holdings Count | $ / shares 3
Investment Company Portfolio Turnover 3.00% [81]
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$599,663,263
Number of Holdings
3
Portfolio Turnover Rate
3%*
[81]
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Portfolio Allocation
(% of Total Investments) †
The DFA International Value Series
56.9%
Dimensional Emerging Markets Value Fund
34.6%
DFA International Small Cap Value Portfolio
8.5%
[82]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name DFA Commodity Strategy Portfolio
Class Name Institutional
Trading Symbol DCMSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the DFA Commodity Strategy Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$19
0.32%1,2
[83],[84]
Expenses Paid, Amount $ 19
Expense Ratio, Percent 0.32% [83],[84]
Net Assets $ 1,411,569,732
Holdings Count | $ / shares 241
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$1,411,569,732
Number of Holdings
241
Portfolio Turnover Rate
11%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
U.S. Treasury Bills    3.586% due 10/29/26
3.5%
U.S. Treasury Bills    3.660% due 09/03/26
2.7%
U.S. Treasury Bills    3.704% due 05/14/26
2.7%
U.S. Treasury Bills    3.645% due 07/16/26
2.6%
New Zealand Government Bonds (New Zealand) 0.250% due 05/15/28
2.3%
New Zealand Local Government Funding Agency Bonds (New Zealand) 2.250% due 05/15/28
2.2%
Australia & New Zealand Banking Group Ltd. (Australia) 4.339% due 07/16/27(1 day USD SOFR + 1.360%)
2.0%
Inter-American Development Bank (Supranational Organization Obligations) 4.001% due 10/04/27(1 day USD SOFR Index + 0.350%)
1.9%
DBS Group Holdings Ltd. (Singapore)4.256% due 03/21/28 (1 day USD SOFR + 0.600%)
1.7%
National Australia Bank Ltd. (Australia)4.278% due 06/11/27 (1 day USD SOFR + 0.620%)
1.5%
Security Type
(% of Total Investments) †
Bonds
77.5%
U.S. Treasury Obligations
11.9%
Commercial Paper
10.4%
Agency Obligations
0.2%
[85]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name World Core Equity Portfolio
Class Name Institutional
Trading Symbol DREIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the World Core Equity Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$14
0.27%1,2
[86],[87]
Expenses Paid, Amount $ 14
Expense Ratio, Percent 0.27% [86],[87]
Net Assets $ 1,287,222,417
Holdings Count | $ / shares 3
Investment Company Portfolio Turnover 2.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$1,287,222,417
Number of Holdings
3
Portfolio Turnover Rate
2%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Portfolio Allocation
(% of Total Investments) †
U.S. Core Equity 1 Portfolio
61.5%
International Core Equity 2 Portfolio
25.6%
Emerging Markets Core Equity 2 Portfolio
12.9%
[88]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name Selectively Hedged Global Equity Portfolio
Class Name Institutional
Trading Symbol DSHGX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Selectively Hedged Global Equity Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$16
0.30%1,2
[89],[90]
Expenses Paid, Amount $ 16
Expense Ratio, Percent 0.30% [89],[90]
Net Assets $ 366,203,413
Holdings Count | $ / shares 3
Investment Company Portfolio Turnover 4.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$366,203,413
Number of Holdings
3
Portfolio Turnover Rate
4%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Portfolio Allocation
(% of Total Investments) †
U.S. Core Equity 2 Portfolio
56.5%
International Core Equity 2 Portfolio
24.0%
Emerging Markets Core Equity 2 Portfolio
19.5%
[91]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name World ex U.S. Targeted Value Portfolio
Class Name Institutional
Trading Symbol DWUSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the World ex U.S. Targeted Value Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$25
0.47%1
[92]
Expenses Paid, Amount $ 25
Expense Ratio, Percent 0.47% [92]
Net Assets $ 904,717,207
Holdings Count | $ / shares 4,956
Investment Company Portfolio Turnover 9.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$904,717,207
Number of Holdings
4,956
Portfolio Turnover Rate
9%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
BPER Banca SpA
0.8%
Helvetia Baloise Holding AG
0.7%
Bank of Ireland Group PLC
0.7%
Banco de Sabadell SA
0.7%
Banco BPM SpA
0.6%
Centrica PLC
0.5%
NN Group NV
0.5%
AIB Group PLC
0.5%
Sandoz Group AG
0.5%
ABN AMRO Bank NV
0.4%
Top Countries
(% of Total Investments) †
Japan
16.1%
China
8.8%
Canada
8.4%
United Kingdom
7.7%
Taiwan
6.3%
Switzerland
5.3%
India
4.9%
South Korea
4.6%
Australia
4.0%
Italy
3.9%
[93]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name World ex U.S. Core Equity Portfolio
Class Name Institutional
Trading Symbol DFWIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the World ex U.S. Core Equity Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$15
0.29%1
[94]
Expenses Paid, Amount $ 15
Expense Ratio, Percent 0.29% [94]
Net Assets $ 5,364,006,703
Holdings Count | $ / shares 10,890
Investment Company Portfolio Turnover 3.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$5,364,006,703
Number of Holdings
10,890
Portfolio Turnover Rate
3%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
Taiwan Semiconductor Manufacturing Co. Ltd. (2330 TT)
1.5%
Samsung Electronics Co. Ltd.
1.3%
Taiwan Semiconductor Manufacturing Co. Ltd. (TSM US)
0.8%
SK Hynix, Inc.
0.7%
ASML Holding NV
0.6%
TotalEnergies SE
0.6%
Tencent Holdings Ltd.
0.5%
Shell PLC
0.5%
Roche Holding AG
0.4%
Nestle SA
0.4%
Top Countries
(% of Total Investments) †
Japan
14.7%
Canada
8.6%
Taiwan
8.0%
China
8.0%
United Kingdom
7.4%
South Korea
5.9%
Germany
5.0%
Switzerland
5.0%
France
4.9%
India
4.5%
[95]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name U.S. Large Cap Equity Portfolio
Class Name Institutional
Trading Symbol DUSQX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the U.S. Large Cap Equity Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$7
0.13%1
[96]
Expenses Paid, Amount $ 7
Expense Ratio, Percent 0.13% [96]
Net Assets $ 2,567,186,242
Holdings Count | $ / shares 537
Investment Company Portfolio Turnover 3.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$2,567,186,242
Number of Holdings
537
Portfolio Turnover Rate
3%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
NVIDIA Corp.
7.5%
Apple, Inc.
6.5%
Microsoft Corp.
4.9%
Amazon.com, Inc.
4.4%
Alphabet, Inc. A
2.8%
Alphabet, Inc. C
2.7%
Meta Platforms, Inc. A
2.4%
Broadcom, Inc.
2.2%
JPMorgan Chase & Co.
1.3%
Eli Lilly & Co.
1.2%
Sector Allocation
(% of Total Investments) †
Information Technology
32.5%
Financials
11.7%
Industrials
10.4%
Communication Services
10.2%
Consumer Discretionary
10.2%
Health Care
8.6%
Consumer Staples
5.5%
Energy
5.0%
Utilities
3.3%
Materials
2.5%
Real Estate
0.1%
[97]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name Global Small Company Portfolio
Class Name Institutional
Trading Symbol DGLIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Global Small Company Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$22
0.42%1,2
[98],[99]
Expenses Paid, Amount $ 22
Expense Ratio, Percent 0.42% [98],[99]
Net Assets $ 149,762,241
Holdings Count | $ / shares 7
Investment Company Portfolio Turnover 6.00% [100]
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$149,762,241
Number of Holdings
7
Portfolio Turnover Rate
6%*
[100]
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Portfolio Allocation
(% of Total Investments) †
U.S. Small Cap Portfolio
61.7%
The Emerging Markets Small Cap Series
12.7%
The Continental Small Company Series
10.7%
The Japanese Small Company Series
5.7%
The Canadian Small Company Series
3.8%
The United Kingdom Small Company Series
2.7%
The Asia Pacific Small Company Series
2.6%
[101]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name U.S. High Relative Profitability Portfolio
Class Name Institutional
Trading Symbol DURPX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the U.S. High Relative Profitability Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$11
0.22%1,2
[102],[103]
Expenses Paid, Amount $ 11
Expense Ratio, Percent 0.22% [102],[103]
Net Assets $ 6,097,874,808
Holdings Count | $ / shares 147
Investment Company Portfolio Turnover 4.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$6,097,874,808
Number of Holdings
147
Portfolio Turnover Rate
4%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
NVIDIA Corp.
7.6%
Apple, Inc.
6.2%
Meta Platforms, Inc. A
4.4%
Eli Lilly & Co.
4.3%
Microsoft Corp.
4.0%
Visa, Inc. A
3.9%
Caterpillar, Inc.
2.9%
Costco Wholesale Corp.
2.4%
Mastercard, Inc. A
2.1%
Home Depot, Inc.
2.0%
Sector Allocation
(% of Total Investments) †
Information Technology
32.2%
Industrials
16.6%
Health Care
13.1%
Consumer Discretionary
10.0%
Financials
8.9%
Consumer Staples
7.9%
Communication Services
6.7%
Energy
2.9%
Utilities
1.0%
Materials
0.7%
[104]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name International High Relative Profitability Portfolio
Class Name Institutional
Trading Symbol DIHRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the International High Relative Profitability Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$15
0.29%1,2
[105],[106]
Expenses Paid, Amount $ 15
Expense Ratio, Percent 0.29% [105],[106]
Net Assets $ 1,777,381,816
Holdings Count | $ / shares 424
Investment Company Portfolio Turnover 8.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$1,777,381,816
Number of Holdings
424
Portfolio Turnover Rate
8%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
Roche Holding AG
3.6%
Nestle SA
2.1%
ASML Holding NV
2.1%
LVMH Moet Hennessy Louis Vuitton SE
1.8%
Sony Group Corp.
1.7%
GSK PLC
1.6%
BHP Group Ltd.
1.4%
Advantest Corp.
1.4%
Tokyo Electron Ltd.
1.3%
AstraZeneca PLC
1.2%
Top Countries
(% of Total Investments) †
Japan
22.8%
United Kingdom
12.9%
Canada
10.7%
Switzerland
8.9%
France
8.4%
Germany
7.4%
Australia
7.0%
Netherlands
4.0%
Sweden
3.5%
Spain
2.8%
[107]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name Emerging Markets Targeted Value Portfolio
Class Name Institutional
Trading Symbol DEMGX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Emerging Markets Targeted Value Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$31
0.58%1,2
[108],[109]
Expenses Paid, Amount $ 31
Expense Ratio, Percent 0.58% [108],[109]
Net Assets $ 335,433,812
Holdings Count | $ / shares 3,023
Investment Company Portfolio Turnover 13.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$335,433,812
Number of Holdings
3,023
Portfolio Turnover Rate
13%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
Geely Automobile Holdings Ltd.
0.9%
Wuxi Biologics Cayman, Inc.
0.9%
Unimicron Technology Corp.
0.7%
China Resources Land Ltd.
0.6%
Samsung Electro-Mechanics Co. Ltd.
0.6%
TS Financial Holding Co. Ltd.
0.6%
China Hongqiao Group Ltd.
0.6%
JD.com, Inc. A
0.5%
Cemex SAB de CV
0.5%
Zhen Ding Technology Holding Ltd.
0.5%
Top Countries
(% of Total Investments) †
China
28.6%
Taiwan
20.5%
India
15.0%
South Korea
14.5%
Brazil
3.2%
South Africa
2.7%
Mexico
2.5%
Saudi Arabia
2.2%
Malaysia
1.7%
United Arab Emirates
1.5%
[110]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
Institutional  
Shareholder Report [Line Items]  
Fund Name Emerging Markets ex China Core Equity Portfolio
Class Name Institutional
Trading Symbol DAADX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Emerging Markets ex China Core Equity Portfolio (the “Portfolio”) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Portfolio at https://www.dimensional.com/us-en/document-center. You can also request this information at no cost by contacting us collect at (512) 306-7400.
Additional Information Phone Number (512) 306-7400
Additional Information Website https://www.dimensional.com/us-en/document-center
Expenses [Text Block]
WHAT WERE THE Portfolio COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional
$24
0.43%1,2
[111],[112]
Expenses Paid, Amount $ 24
Expense Ratio, Percent 0.43% [111],[112]
Net Assets $ 1,150,128,762
Holdings Count | $ / shares 3,825
Investment Company Portfolio Turnover 5.00%
Additional Fund Statistics [Text Block]
KEY Portfolio STATISTICS (as of April 30, 2026)
Net Assets
$1,150,128,762
Number of Holdings
3,825
Portfolio Turnover Rate
5%
Holdings [Text Block]
WHAT DID THE Portfolio INVEST IN? (as of April 30, 2026)
Top 10 Holdings
(% of Total Investments) †
Taiwan Semiconductor Manufacturing Co. Ltd.
14.1%
SK Hynix, Inc.
5.1%
Samsung Electronics Co. Ltd. (005930 KS)
4.8%
Samsung Electronics Co. Ltd. (SMSN LI)
1.4%
MediaTek, Inc.
0.8%
Unimicron Technology Corp.
0.5%
Petroleo Brasileiro SA - Petrobras
0.5%
Hyundai Motor Co.
0.5%
ASE Technology Holding Co. Ltd.
0.5%
Delta Electronics, Inc.
0.4%
Top Countries
(% of Total Investments) †
Taiwan
32.9%
South Korea
23.9%
India
15.0%
Brazil
4.8%
South Africa
4.1%
Saudi Arabia
2.8%
Mexico
2.3%
United Arab Emirates
2.0%
Malaysia
1.8%
Poland
1.7%
[113]
Updated Prospectus Web Address https://www.dimensional.com/us-en/document-center
[1]
1 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[2]
2 Annualized
[3]
† Excludes money market funds and collateral for loaned securities, if any.
[4]
1 Commenced operations during the reporting period. Expenses for a full reporting period would be higher than the amounts shown.
[5]
2 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[6]
3 Annualized
[7]
† Excludes money market funds and collateral for loaned securities, if any.
[8]
1 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[9]
2 Annualized
[10]
† Excludes money market funds and collateral for loaned securities, if any.
[11]
1 Annualized
[12]
† Excludes money market funds and collateral for loaned securities, if any.
[13]
1 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[14]
2 Annualized
[15]
† Excludes money market funds and collateral for loaned securities, if any.
[16]
1 The Portfolio is a feeder portfolio that pursues its objective by investing substantially all of its assets in a corresponding master series. The expense table reflects the direct expenses of the Portfolio and its allocated portion of the expenses of the master series.
[17]
2 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[18]
3 Annualized
[19]
† Excludes money market funds, if any.
[20]
1 The Portfolio is a feeder portfolio that pursues its objective by investing substantially all of its assets in a corresponding master series. The expense table reflects the direct expenses of the Portfolio and its allocated portion of the expenses of the master series.
[21]
2 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[22]
3 Annualized
[23]
† Excludes money market funds, if any.
[24]
1 The Portfolio is a feeder portfolio that pursues its objective by investing substantially all of its assets in a corresponding master series. The expense table reflects the direct expenses of the Portfolio and its allocated portion of the expenses of the master series.
[25]
2 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[26]
3 Annualized
[27]
† Excludes money market funds, if any.
[28]
1 The Portfolio is a feeder portfolio that pursues its objective by investing substantially all of its assets in a corresponding master series. The expense table reflects the direct expenses of the Portfolio and its allocated portion of the expenses of the master series.
[29]
2 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[30]
3 Annualized
[31]
† Excludes money market funds, if any.
[32]
1 The Portfolio is a feeder portfolio that pursues its objective by investing substantially all of its assets in a corresponding master series. The expense table reflects the direct expenses of the Portfolio and its allocated portion of the expenses of the master series.
[33]
2 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[34]
3 Annualized
[35]
† Excludes money market funds, if any.
[36]
1 The Portfolio is a feeder portfolio that pursues its objective by investing substantially all of its assets in a corresponding master series. The expense table reflects the direct expenses of the Portfolio and its allocated portion of the expenses of the master series.
[37]
2 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[38]
3 Annualized
[39]
† Excludes money market funds, if any.
[40]
1 Annualized
[41]
* Calculated based on weighted average of each of the Portfolio’s underlying investments.
[42]
† Excludes money market funds, if any.
[43]
1 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[44]
2 Annualized
[45]
† Excludes money market funds and collateral for loaned securities, if any.
[46]
1 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[47]
2 Annualized
[48]
† Excludes money market funds and collateral for loaned securities, if any.
[49]
1 Annualized
[50]
† Excludes money market funds and collateral for loaned securities, if any.
[51]
1 Annualized
[52]
† Excludes money market funds and collateral for loaned securities, if any.
[53]
1 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[54]
2 Annualized
[55]
† Excludes money market funds and collateral for loaned securities, if any.
[56]
1 The Portfolio is a feeder portfolio that pursues its objective by investing substantially all of its assets in a corresponding master series. The expense table reflects the direct expenses of the Portfolio and its allocated portion of the expenses of the master series.
[57]
2 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[58]
3 Annualized
[59]
† Excludes money market funds, if any.
[60]
1 Annualized
[61]
† Excludes money market funds and collateral for loaned securities, if any.
[62]
1 Annualized
[63]
† Excludes money market funds and collateral for loaned securities, if any.
[64]
1 Annualized
[65]
† Excludes money market funds and collateral for loaned securities, if any.
[66]
1 Annualized
[67]
† Excludes money market funds and collateral for loaned securities, if any.
[68]
1 The Portfolio is a feeder portfolio that pursues its objective by investing substantially all of its assets in a corresponding master series. The expense table reflects the direct expenses of the Portfolio and its allocated portion of the expenses of the master series.
[69]
2 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[70]
3 Annualized
[71]
† Excludes money market funds, if any.
[72]
1 Annualized
[73]
† Excludes money market funds and collateral for loaned securities, if any.
[74]
1 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[75]
2 Annualized
[76]
† Excludes money market funds and collateral for loaned securities, if any.
[77]
1 Annualized
[78]
† Excludes money market funds and collateral for loaned securities, if any.
[79]
1 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[80]
2 Annualized
[81]
* Calculated based on weighted average of each of the Portfolio’s underlying investments.
[82]
† Excludes money market funds, if any.
[83]
1 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[84]
2 Annualized
[85]
† Excludes money market funds and collateral for loaned securities, if any.
[86]
1 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[87]
2 Annualized
[88]
† Excludes money market funds, if any.
[89]
1 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[90]
2 Annualized
[91]
† Excludes money market funds, if any.
[92]
1 Annualized
[93]
† Excludes money market funds and collateral for loaned securities, if any.
[94]
1 Annualized
[95]
† Excludes money market funds and collateral for loaned securities, if any.
[96]
1 Annualized
[97]
† Excludes money market funds and collateral for loaned securities, if any.
[98]
1 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[99]
2 Annualized
[100]
* Calculated based on weighted average of each of the Portfolio’s underlying investments.
[101]
† Excludes money market funds, if any.
[102]
1 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[103]
2 Annualized
[104]
† Excludes money market funds and collateral for loaned securities, if any.
[105]
1 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[106]
2 Annualized
[107]
† Excludes money market funds and collateral for loaned securities, if any.
[108]
1 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[109]
2 Annualized
[110]
† Excludes money market funds and collateral for loaned securities, if any.
[111]
1 Reflects Fee Waivers and/or Expense Assumptions, without which expenses would have been higher.
[112]
2 Annualized
[113]
† Excludes money market funds and collateral for loaned securities, if any.