Vanguard Short-Term Treasury Fund Annual Fund Operating Expenses - Retail Prospectus [Member] - Vanguard Short-Term Treasury Fund |
Jan. 31, 2026 |
|---|---|
| Investor Shares | |
| Prospectus [Line Items] | |
| Management Fees (as a percentage of Assets) | 0.19% |
| Distribution and Service (12b-1) Fees | 0.00% |
| Other Expenses (as a percentage of Assets): | 0.01% |
| Expenses (as a percentage of Assets) | 0.20% |
| Admiral Shares | |
| Prospectus [Line Items] | |
| Management Fees (as a percentage of Assets) | 0.09% |
| Distribution and Service (12b-1) Fees | 0.00% |
| Other Expenses (as a percentage of Assets): | 0.01% |
| Expenses (as a percentage of Assets) | 0.10% |