S000001268 [Member] Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| MSCI EAFE Index (reflects no deduction for fees, expenses, or taxes) | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 31.22% | 8.92% | 8.18% |
| INTERNATIONAL EQUITY INDEX FUND | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 31.82% | 8.99% | 8.26% |
| INTERNATIONAL EQUITY INDEX FUND | After Taxes on Distributions | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 30.65% | 8.23% | 7.60% |
| INTERNATIONAL EQUITY INDEX FUND | After Taxes on Distributions and Sales | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 19.52% | 7.03% | 6.65% |