Vanguard Mid-Cap Value 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 |
|
| Investor Prospectus [Member] | Vanguard Mid-Cap Value Index Fund | Investor Shares | ||||||||
| Prospectus [Line Items] | ||||||||
| Annual Return [Percent] | 11.91% | 13.89% | 9.62% | (8.00%) | 28.59% | 2.43% | 27.82% | (12.53%) |