Annual Total Returns |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Elfun Income Fund | Elfun Income Fund | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 7.34% | 0.26% | 5.78% | (13.47%) | (1.19%) | 8.03% | 9.50% | (0.80%) | 3.90% | 3.52% |