Vanguard Cash Reserves Federal Money Market 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 |
|
| Retail Prospectus [Member] | Vanguard Cash Reserves Federal Money Market Fund | Admiral Shares | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 5.24% | 5.10% | 1.56% | 0.02% | 0.57% | 2.29% | 2.01% | 1.08% | 0.55% | 0.11% |