Vanguard Intermediate-Term Bond Index 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 |
|
| Admiral Prospectus [Member] | Vanguard Intermediate-Term Bond Index Fund | Admiral Shares | ||||||||
| Prospectus [Line Items] | ||||||||
| Annual Return [Percent] | 8.56% | 1.51% | 6.07% | (13.27%) | (2.36%) | 9.80% | 10.18% | (0.17%) |