Investment Objectives and Goals |
Dec. 31, 2025 |
|---|---|
| Midcap Stock Portfolio | |
| Prospectus [Line Items] | |
| Risk/Return [Heading] | Fund Summary |
| Objective [Heading] | Investment Objective |
| Objective, Primary [Text Block] | The fund seeks investment results that are greater than the total return performance of publicly traded common stocks of medium-size domestic companies in the aggregate, as represented by the Standard & Poor's MidCap 400® Index (S&P MidCap 400 Index). |
| Small Cap Stock Index Portfolio | |
| Prospectus [Line Items] | |
| Risk/Return [Heading] | Fund Summary |
| Objective [Heading] | Investment Objective |
| Objective, Primary [Text Block] | The fund seeks to match the performance of the Standard & Poor's® SmallCap 600 Index (S&P SmallCap 600 Index). |
| Technology Growth Portfolio | |
| Prospectus [Line Items] | |
| Risk/Return [Heading] | Fund Summary |
| Objective [Heading] | Investment Objective |
| Objective, Primary [Text Block] | The fund seeks capital appreciation. |