Vanguard Total International Bond Index Fund Average Annual Total Returns - Institutional Prospectus [Member] |
12 Months Ended | 58 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| Bloomberg Global Aggregate ex-USD Float Adjusted RIC Capped Index (USD Hedged) (reflects no deduction for fees, expenses, or taxes)[Member] | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 3.03% | 0.16% | (0.12%) | 2.25% |
| Bloomberg Global Aggregate Index ex USD (reflects no deduction for fees, expenses, or taxes)[Member] | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 8.85% | (3.22%) | (3.59%) | 0.56% |
| Institutional Shares | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 3.02% | (0.18%) | 2.13% | |
| Institutional Shares | After Taxes on Distributions | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 1.22% | (1.60%) | 0.92% | |
| Institutional Shares | After Taxes on Distributions and Sales | ||||
| Prospectus [Line Items] | ||||
| Average Annual Return, Percent | 1.78% | (0.72%) | 1.13% |