Vanguard Short-Term Treasury Index Fund Annual Total Returns |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
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 |
Dec. 31, 2015 |
|
| ETF Prospectus [Member] | Vanguard Short-Term Treasury Index Fund | ETF Shares | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 4.02% | 4.29% | (3.86%) | (0.64%) | 3.12% | 3.52% | 1.48% | 0.38% | 0.79% | 0.51% |