Money Market Portfolio Average Annual Total Returns - Portfolio [Member] |
12 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| FTSE 3-Month U.S. Treasury Bill Index (reflects no deduction for fees or expenses)[Member] | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 4.40% | 3.30% | 2.22% |
| Variable Insurance U.S. Government Money Market Funds Average[Member] | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 3.89% | 2.88% | |
| Spliced Variable Insurance U.S. Government Money Market Funds Average[Member] | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 3.89% | 2.88% | 1.83% |
| Money Market Portfolio | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 4.18% | 3.17% | 2.20% |