Vanguard Market Liquidity Fund Average Annual Total Returns - Investor Prospectus [Member] |
12 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2024 |
Dec. 31, 2024 |
|
| Institutional Money Market Funds Average[Member] | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 4.81% | 2.31% | 1.65% |
| U.S. Government Money Market Funds Average[Member] | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 4.73% | 2.15% | 1.39% |
| Investor Shares | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 5.36% | 2.55% | 1.90% |