Vanguard Energy 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 |
|
| Admiral Prospectus [Member] | Vanguard Energy Index Fund | Admiral Shares | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 6.57% | 0.03% | 62.97% | 56.13% | (33.00%) | 9.34% | (19.91%) | (2.39%) | 28.94% | (23.22%) |