Investment Objectives and Goals |
Sep. 25, 2026 |
|---|---|
| U.S. CORE EQUITY 1 PORTFOLIO | |
| Prospectus [Line Items] | |
| Risk/Return [Heading] | U.S. Core Equity 1 Portfolio |
| U.S. CORE EQUITY 2 PORTFOLIO | |
| Prospectus [Line Items] | |
| Risk/Return [Heading] | U.S. Core Equity 2 Portfolio |
| U.S. VECTOR EQUITY PORTFOLIO | |
| Prospectus [Line Items] | |
| Risk/Return [Heading] | U.S. Vector Equity Portfolio |
| U.S. High Relative Profitability Portfolio | |
| Prospectus [Line Items] | |
| Risk/Return [Heading] | U.S. High Relative Profitability Portfolio |
| U.S. SMALL CAP PORTFOLIO | |
| Prospectus [Line Items] | |
| Risk/Return [Heading] | U.S. Small Cap Portfolio |
| U.S. Targeted Value Portfolio | |
| Prospectus [Line Items] | |
| Risk/Return [Heading] | U.S. Targeted Value Portfolio |
| U.S. SMALL CAP VALUE PORTFOLIO | |
| Prospectus [Line Items] | |
| Risk/Return [Heading] | U.S. Small Cap Value Portfolio |
| DFA REAL ESTATE SECURITIES PORTFOLIO | |
| Prospectus [Line Items] | |
| Risk/Return [Heading] | DFA Real Estate Securities Portfolio |