Index 600 Stock Portfolio Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| S&P SmallCap 600® Index(reflects no deduction for fees, expenses or taxes)[Member] | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 6.02% | 7.31% | 9.81% |
| S&P 500® Index(reflects no deduction for fees, expenses or taxes)[Member] | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 17.88% | 14.42% | 14.82% |
| Index 600 Stock Portfolio | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 5.78% | 6.98% | 9.48% |