Vanguard Short-Term Treasury Fund 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 |
|
| Retail Prospectus [Member] | Vanguard Short-Term Treasury Fund | Investor Shares | ||||||||
| Prospectus [Line Items] | ||||||||
| Annual Return [Percent] | 5.35% | 3.73% | 3.51% | (4.71%) | (0.87%) | 3.96% | 3.59% | 1.35% |