Vanguard Total International Bond Index Fund Average Annual Total Returns - Investor Prospectus [Member] |
12 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|
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% | (0.12%) | 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% | (3.59%) | 0.56% |
| Investor Shares | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 2.88% | (0.26%) | 2.07% |
| Investor Shares | After Taxes on Distributions | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 1.11% | (1.65%) | 0.88% |
| Investor Shares | After Taxes on Distributions and Sales | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 1.70% | (0.77%) | 1.09% |