Vanguard Total Bond Market 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 |
|
| ETF Prospectus [Member] | Vanguard Total Bond Market Index Fund | ETF Shares | ||||||||
| Prospectus [Line Items] | ||||||||
| Annual Return [Percent] | 7.11% | 1.34% | 5.70% | (13.15%) | (1.66%) | 7.71% | 8.71% | (0.04%) |