Total International Stock Market Index Portfolio Average Annual Total Returns - Portfolio [Member] |
12 Months Ended | 60 Months Ended | 100 Months Ended | 120 Months Ended | |
|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| FTSE Global All Cap ex US Index (reflects no deduction for fees or expenses)[Member] | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 31.95% | 8.04% | 7.41% | ||
| MSCI ACWI ex USA Index (reflects no deduction for fees or expenses)[Member] | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 32.39% | 7.91% | 7.25% | 8.41% | |
| Total International Stock Market Index Portfolio | |||||
| Prospectus [Line Items] | |||||
| Average Annual Return, Percent | 32.04% | 7.88% | 7.20% | ||
| Performance Inception Date | Sep. 07, 2017 |