v3.25.2
Shareholder Report, Holdings (Details)
Jun. 30, 2025
SA U.S. Fixed Income Fund | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 48.20%
SA U.S. Fixed Income Fund | U.S. Government & Agency Obligations [Member]  
Holdings [Line Items]  
Percent of Total Investments 36.70%
SA U.S. Fixed Income Fund | Yankee Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.10%
SA Global Fixed Income Fund | UNITED STATES  
Holdings [Line Items]  
Percent of Total Investments 29.70%
SA Global Fixed Income Fund | CANADA  
Holdings [Line Items]  
Percent of Total Investments 17.60%
SA Global Fixed Income Fund | Supranational [Member]  
Holdings [Line Items]  
Percent of Total Investments 14.80%
SA Global Fixed Income Fund | AUSTRALIA  
Holdings [Line Items]  
Percent of Total Investments 9.70%
SA Global Fixed Income Fund | FRANCE  
Holdings [Line Items]  
Percent of Total Investments 8.70%
SA Global Fixed Income Fund | NEW ZEALAND  
Holdings [Line Items]  
Percent of Total Investments 3.50%
SA Global Fixed Income Fund | NETHERLANDS  
Holdings [Line Items]  
Percent of Total Investments 3.10%
SA Global Fixed Income Fund | NORWAY  
Holdings [Line Items]  
Percent of Total Investments 2.80%
SA Global Fixed Income Fund | FINLAND  
Holdings [Line Items]  
Percent of Total Investments 2.70%
SA Global Fixed Income Fund | Others [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.40%
SA Global Fixed Income Fund | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.70%
SA Global Fixed Income Fund | U.S. Government & Agency Obligations [Member]  
Holdings [Line Items]  
Percent of Total Investments 20.20%
SA Global Fixed Income Fund | Sovereign Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 54.10%
SA U.S. Core Market Fund | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 29.10%
SA U.S. Core Market Fund | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.80%
SA U.S. Core Market Fund | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.70%
SA U.S. Core Market Fund | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.70%
SA U.S. Core Market Fund | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.60%
SA U.S. Core Market Fund | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.30%
SA U.S. Core Market Fund | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.50%
SA U.S. Core Market Fund | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.80%
SA U.S. Core Market Fund | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.50%
SA U.S. Core Market Fund | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.90%
SA U.S. Value Fund | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.70%
SA U.S. Value Fund | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 26.10%
SA U.S. Value Fund | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00%
SA U.S. Value Fund | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.70%
SA U.S. Value Fund | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.00%
SA U.S. Value Fund | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.50%
SA U.S. Value Fund | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.60%
SA U.S. Value Fund | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.20%
SA U.S. Value Fund | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.60%
SA U.S. Value Fund | Real Estate [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.60%
SA U.S. Small Company Fund | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.80%
SA U.S. Small Company Fund | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 21.40%
SA U.S. Small Company Fund | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.00%
SA U.S. Small Company Fund | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20%
SA U.S. Small Company Fund | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.70%
SA U.S. Small Company Fund | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 22.40%
SA U.S. Small Company Fund | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.40%
SA U.S. Small Company Fund | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.70%
SA U.S. Small Company Fund | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.20%
SA U.S. Small Company Fund | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.60%
SA International Value Fund | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 35.20%
SA International Value Fund | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.80%
SA International Value Fund | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00%
SA International Value Fund | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.90%
SA International Value Fund | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.40%
SA International Value Fund | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00%
SA International Value Fund | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.10%
SA International Value Fund | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00%
SA International Value Fund | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.30%
SA International Value Fund | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00%
SA International Value Fund | CANADA  
Holdings [Line Items]  
Percent of Total Investments 10.60%
SA International Value Fund | AUSTRALIA  
Holdings [Line Items]  
Percent of Total Investments 6.10%
SA International Value Fund | FRANCE  
Holdings [Line Items]  
Percent of Total Investments 10.70%
SA International Value Fund | NETHERLANDS  
Holdings [Line Items]  
Percent of Total Investments 4.70%
SA International Value Fund | Others [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.70%
SA International Value Fund | JAPAN  
Holdings [Line Items]  
Percent of Total Investments 20.40%
SA International Value Fund | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Total Investments 12.40%
SA International Value Fund | SWITZERLAND  
Holdings [Line Items]  
Percent of Total Investments 9.40%
SA International Value Fund | GERMANY  
Holdings [Line Items]  
Percent of Total Investments 8.60%
SA International Value Fund | SPAIN  
Holdings [Line Items]  
Percent of Total Investments 3.40%
SA International Small Company Fund | DFA International Small Company Portfolio, Class Institutional [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [1]
SA Emerging Markets Value Fund | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 14.00%
SA Emerging Markets Value Fund | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 30.50%
SA Emerging Markets Value Fund | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.40%
SA Emerging Markets Value Fund | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.80%
SA Emerging Markets Value Fund | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.50%
SA Emerging Markets Value Fund | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.40%
SA Emerging Markets Value Fund | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.40%
SA Emerging Markets Value Fund | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.40%
SA Emerging Markets Value Fund | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.20%
SA Emerging Markets Value Fund | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.80%
SA Emerging Markets Value Fund | Others [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.60%
SA Emerging Markets Value Fund | CHINA  
Holdings [Line Items]  
Percent of Total Investments 28.40%
SA Emerging Markets Value Fund | INDIA  
Holdings [Line Items]  
Percent of Total Investments 21.70%
SA Emerging Markets Value Fund | TAIWAN  
Holdings [Line Items]  
Percent of Total Investments 19.80%
SA Emerging Markets Value Fund | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Total Investments 11.20%
SA Emerging Markets Value Fund | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Total Investments 3.40%
SA Emerging Markets Value Fund | BRAZIL  
Holdings [Line Items]  
Percent of Total Investments 3.10%
SA Emerging Markets Value Fund | MEXICO  
Holdings [Line Items]  
Percent of Total Investments 1.80%
SA Emerging Markets Value Fund | UNITED ARAB EMIRATES  
Holdings [Line Items]  
Percent of Total Investments 1.50%
SA Emerging Markets Value Fund | INDONESIA  
Holdings [Line Items]  
Percent of Total Investments 1.50%
SA Real Estate Securities Fund | Specialized REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 39.50%
SA Real Estate Securities Fund | Retail REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.70%
SA Real Estate Securities Fund | Residential REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 14.30%
SA Real Estate Securities Fund | Health Care REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.70%
SA Real Estate Securities Fund | Industrial REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.70%
SA Real Estate Securities Fund | Office REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.50%
SA Real Estate Securities Fund | Diversified REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.30%
SA Real Estate Securities Fund | Hotel & Resort REITs [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.30%
SA Worldwide Moderate Growth Fund | S A International Value Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.20%
SA Worldwide Moderate Growth Fund | S A U.S. Core Market Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.90%
SA Worldwide Moderate Growth Fund | S A U.S. Value Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.90%
SA Worldwide Moderate Growth Fund | S A U.S. Fixed Income Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.90%
SA Worldwide Moderate Growth Fund | S A Global Fixed Income Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.80%
SA Worldwide Moderate Growth Fund | S A Emerging Markets Value Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
SA Worldwide Moderate Growth Fund | S A U.S. Small Company Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
SA Worldwide Moderate Growth Fund | S A Real Estate Securities Fund [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
[1] The Fund pursues its goal by investing substantially all its assets in the International Small Company Portfolio of DFA Investment Dimensions Group Inc. (the “DFA Portfolio”), a separate registered investment company with the same investment objective and investment policies as the Fund. The DFA Portfolio invests substantially all its assets in the following series of The DFA Investment Trust Company: The Japanese Small Company Series, The United Kingdom Small Company Series, The Continental Small Company Series, The Asia Pacific Small Company Series and The Canadian Small Company Series. Financial statements and other information about the DFA International Small Company Portfolio, including its portfolio holdings, are available at https://www.dimensional.com/usen/funds/dfisx/international-small-company-portfolio-i.