Vanguard SP Small-Cap 600 Index Fund Average Annual Total Returns - ETF Prospectus [Member] |
12 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2024 |
Dec. 31, 2024 |
|
| S&P SmallCap 600 Index (reflects no deduction for fees, expenses, or taxes)[Member] | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 8.70% | 8.36% | 8.96% |
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes)[Member] | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 23.88% | 13.78% | 12.48% |
| ETF Shares | After Taxes on Distributions | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 8.21% | 7.93% | 8.54% |
| ETF Shares | After Taxes on Distributions and Sales | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 5.34% | 6.49% | 7.20% |
| ETF Shares | Based on NAV[Member] | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 8.62% | 8.31% | 8.90% |
| ETF Shares | Based on Market Price[Member] | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 8.53% | 8.31% | 8.90% |