 
 |  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | Since   Fund   Inception | Fund   Inception   Date | 
| Vanguard Total Stock Market Index Fund  Institutional Select Shares |  |  |  |  | 
| Return Before Taxes | % | % | % |  | 
| Return After Taxes on Distributions |  |  |  |  | 
| Return After Taxes on Distributions and Sale  of Fund Shares |  |  |  |  | 
| CRSP US Total Market Index (reflects no deduction for fees, expenses,  or taxes) | % | % | % |  | 
| Dow Jones U.S. Total Stock Market Float  Adjusted Index (reflects no deduction for fees, expenses,  or taxes) |  |  |  |  | 
 symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether the Fund is the right investment for you. We suggest that you keep this prospectus for future reference.
  symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether the Fund is the right investment for you. We suggest that you keep this prospectus for future reference.| Plain Talk About Costs of Investing | 
| Costs are an important consideration in choosing a mutual fund. That is  because you, as a shareholder, pay a proportionate share of the costs of  operating a fund and any transaction costs incurred when the fund buys or  sells securities, including costs generated by shareholders of other share  classes offered by the fund. These costs can erode a substantial portion of  the gross income or the capital appreciation a fund achieves. Even  seemingly small differences in expenses can, over time, have a dramatic  effect on a fund’s performance.   | 
 
  
 | Plain Talk About Vanguard’s Unique Corporate Structure | 
| Vanguard is owned jointly by the funds it oversees and thus indirectly by the  shareholders in those funds. Most other mutual funds are operated by  management companies that are owned by third parties—either public or  private stockholders—and not by the funds they serve. | 
| Plain Talk About Distributions | 
| As a shareholder, you are entitled to your portion of a fund’s income from  interest as well as capital gains from the fund’s sale of investments. Income  consists of interest the fund earns from its money market and bond  investments. Capital gains are realized whenever the fund sells securities for  higher prices than it paid for them. These capital gains are either short-term  or long-term, depending on whether the fund held the securities for one year  or less or for more than one year. | 
| Plain Talk About Buying a Dividend | 
| Unless you are a tax-exempt investor or investing through a tax-advantaged  account (such as an IRA or an employer-sponsored retirement or savings  plan), you should consider avoiding a purchase of fund shares shortly before  the fund makes a distribution, because doing so can cost you money in  taxes. This is known as “buying a dividend.” For example: On December 15,  you invest $5,000, buying 250 shares for $20 each. If the fund pays a  distribution of $1 per share on December 16, its share price will drop to $19  (not counting market change). You still have only $5,000 (250 shares x $19 =  $4,750 in share value, plus 250 shares x $1 = $250 in distributions), but you  owe tax on the $250 distribution you received—even if you reinvest it in more  shares. To avoid buying a dividend, check a fund’s distribution schedule  before you invest. | 
|  |  |  |  |  |  | 
| For a Share Outstanding Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $183.25 | $231.36 | $186.45 | $156.83 | $122.20 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 3.312 | 3.093 | 2.821 | 2.772 | 2.709 | 
| Capital Gain Distributions Received | .0001,2 | .0001,2 | .0001,2 | — | — | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 44.079 | (48.139) | 44.937 | 29.532 | 34.731 | 
| Total from Investment Operations | 47.391 | (45.046) | 47.758 | 32.304 | 37.440 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (3.271) | (3.064) | (2.848) | (2.684) | (2.810) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (3.271) | (3.064) | (2.848) | (2.684) | (2.810) | 
| Net Asset Value, End of Period | $227.37 | $183.25 | $231.36 | $186.45 | $156.83 | 
| Total Return | 26.05% | -19.50% | 25.75% | 21.03% | 30.84% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $61,187 | $44,101 | $52,780 | $44,296 | $26,431 | 
| Ratio of Total Expenses to Average Net Assets | 0.01%3 | 0.01%3 | 0.01% | 0.01% | 0.01% | 
| Ratio of Net Investment Income to Average Net  Assets | 1.62% | 1.57% | 1.33% | 1.76% | 1.91% | 
| Portfolio Turnover Rate4 | 2% | 3% | 4% | 8% | 4% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Distribution was less than $.001 per share. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.01%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
| Web |  | 
| Vanguard.com | For the most complete source of Vanguard news   For fund, account, and service information   For most account transactions   For literature requests   24 hours a day, 7 days a week | 
| Phone | |
| Client Services 800-662-2739 (Text telephone for people with  hearing impairment at 800-749-7273) | For account information For most account transactions | 
| Participant Services 800-523-1188 (Text telephone for people with  hearing impairment at 800-749-7273) | For information and services for participants in  employer-sponsored plans | 
| Institutional Division 888-809-8102 | For information and services for large institutional  investors | 
| Financial Advisor and Intermediary Sales Support 800-997-2798 | For information and services for financial intermediaries  including financial advisors, broker-dealers, trust  institutions, and insurance companies | 
| Financial Advisory and Intermediary  Trading Support 800-669-0498 | For account information and trading support for  financial intermediaries including financial advisors,  broker-dealers, trust institutions, and insurance  companies | 
| Vanguard Fund | Inception Date | Newspaper Abbreviation | Vanguard Fund Number | CUSIP Number | 
| Vanguard Total Stock Market Index Fund | ||||
| Institutional Select Shares | 6/27/2016 (Institutional Shares 7/7/1997) | VanTStMIxInsSel | 1785 | 922908330 | 
 
  
 |  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard 500 Index Fund Investor Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| Standard & Poor’s 500 Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
 symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether the Fund is the right investment for you. We suggest that you keep this prospectus for future reference.
  symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether the Fund is the right investment for you. We suggest that you keep this prospectus for future reference.| Plain Talk About Fund Expenses | 
| All mutual funds have operating expenses. These expenses, which are  deducted from a fund’s gross income, are expressed as a percentage of the  net assets of the fund. Assuming that operating expenses remain as stated in  the Fees and Expenses section, Vanguard 500 Index Fund Investor Shares’  expense ratio would be 0.14%, or $1.40 per $1,000 of average net assets.  The average expense ratio for large-cap core funds in 2023 was 0.88%, or  $8.80 per $1,000 of average net assets (derived from data provided by  Lipper, a Thomson Reuters Company, which reports on the mutual  fund industry). | 
| Plain Talk About Costs of Investing | 
| Costs are an important consideration in choosing a mutual fund. That is  because you, as a shareholder, pay a proportionate share of the costs of  operating a fund and any transaction costs incurred when the fund buys or  sells securities, including costs generated by shareholders of other share  classes offered by the fund. These costs can erode a substantial portion of  the gross income or the capital appreciation a fund achieves. Even  seemingly small differences in expenses can, over time, have a dramatic  effect on a fund’s performance. | 
 
  
  
 | Plain Talk About Vanguard’s Unique Corporate Structure | 
| Vanguard is owned jointly by the funds it oversees and thus indirectly by the  shareholders in those funds. Most other mutual funds are operated by  management companies that are owned by third parties—either public or  private stockholders—and not by the funds they serve. | 
| Plain Talk About Distributions | 
| As a shareholder, you are entitled to your portion of a fund’s income from  interest and dividends as well as capital gains from the fund’s sale of  investments. Income consists of both the dividends that the fund earns from  any stock holdings and the interest it receives from any money market and  bond investments. Capital gains are realized whenever the fund sells  securities for higher prices than it paid for them. These capital gains are  either short-term or long-term, depending on whether the fund held the  securities for one year or less or for more than one year. | 
| Plain Talk About Buying a Dividend | 
| Unless you are a tax-exempt investor or investing through a tax-advantaged  account (such as an IRA or an employer-sponsored retirement or savings  plan), you should consider avoiding a purchase of fund shares shortly before  the fund makes a distribution, because doing so can cost you money in  taxes. This is known as “buying a dividend.” For example: On December 15,  you invest $5,000, buying 250 shares for $20 each. If the fund pays a  distribution of $1 per share on December 16, its share price will drop to $19  (not counting market change). You still have only $5,000 (250 shares x $19 =  $4,750 in share value, plus 250 shares x $1 = $250 in distributions), but you  owe tax on the $250 distribution you received—even if you reinvest it in more  shares. To avoid buying a dividend, check a fund’s distribution schedule  before you invest. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $354.17 | $439.86 | $346.60 | $298.16 | $231.44 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 5.990 | 5.605 | 4.910 | 5.128 | 4.801 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 85.860 | (85.733) | 93.389 | 48.323 | 67.211 | 
| Total from Investment Operations | 91.850 | (80.128) | 98.299 | 53.451 | 72.012 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (5.970) | (5.562) | (5.039) | (5.011) | (5.292) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (5.970) | (5.562) | (5.039) | (5.011) | (5.292) | 
| Net Asset Value, End of Period | $440.05 | $354.17 | $439.86 | $346.60 | $298.16 | 
| Total Return2 | 26.11% | -18.23% | 28.53% | 18.25% | 31.33% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $3,177 | $3,093 | $4,512 | $4,504 | $4,723 | 
| Ratio of Total Expenses to Average Net Assets | 0.14%3 | 0.14%3 | 0.14% | 0.14% | 0.14% | 
| Ratio of Net Investment Income to Average Net  Assets | 1.52% | 1.47% | 1.25% | 1.73% | 1.82% | 
| Portfolio Turnover Rate4 | 2% | 2% | 2% | 4% | 4% | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.14%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
| Web |  | 
| Vanguard.com | For the most complete source of Vanguard news   For fund, account, and service information   For most account transactions   For literature requests   24 hours a day, 7 days a week | 
| Phone | |
| Investor Information 800-662-7447 (Text telephone for people with  hearing impairment at 800-749-7273) | For fund and service information For literature requests | 
| Client Services 800-662-2739 (Text telephone for people with  hearing impairment at 800-749-7273) | For account information For most account transactions | 
| Participant Services 800-523-1188 (Text telephone for people with  hearing impairment at 800-749-7273) | For information and services for participants in  employer-sponsored plans | 
| Institutional Division 888-809-8102 | For information and services for large institutional  investors | 
| Financial Advisor and Intermediary Sales Support 800-997-2798 | For information and services for financial intermediaries  including financial advisors, broker-dealers, trust  institutions, and insurance companies | 
| Financial Advisory and Intermediary  Trading Support 800-669-0498 | For account information and trading support for  financial intermediaries including financial advisors,  broker-dealers, trust institutions, and insurance  companies | 
| Vanguard Fund | Inception   Date | Newspaper Abbreviation | Vanguard Fund Number | CUSIP Number | 
| Vanguard 500 Index Fund | ||||
| Investor Shares | 8/31/1976 | 500 | 40 | 922908108 | 
 
  
 |  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard 500 Index Fund Admiral Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| Standard & Poor’s 500 Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
 symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether the Fund is the right investment for you. We suggest that you keep this prospectus for future reference.
  symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether the Fund is the right investment for you. We suggest that you keep this prospectus for future reference.| Plain Talk About Fund Expenses | 
| All mutual funds have operating expenses. These expenses, which are  deducted from a fund’s gross income, are expressed as a percentage of the  net assets of the fund. Assuming that operating expenses remain as stated in  the Fees and Expenses section, Vanguard 500 Index Fund Admiral Shares’  expense ratio would be 0.04%, or $0.40 per $1,000 of average net assets.  The average expense ratio for large-cap core funds in 2023 was 0.88%, or  $8.80 per $1,000 of average net assets (derived from data provided by  Lipper, a Thomson Reuters Company, which reports on the mutual  fund industry). | 
| Plain Talk About Costs of Investing | 
| Costs are an important consideration in choosing a mutual fund. That is  because you, as a shareholder, pay a proportionate share of the costs of  operating a fund and any transaction costs incurred when the fund buys or  sells securities, including costs generated by shareholders of other share  classes offered by the fund. These costs can erode a substantial portion of  the gross income or the capital appreciation a fund achieves. Even  seemingly small differences in expenses can, over time, have a dramatic  effect on a fund’s performance. | 
 
  
  
 | Plain Talk About Vanguard’s Unique Corporate Structure | 
| Vanguard is owned jointly by the funds it oversees and thus indirectly by the  shareholders in those funds. Most other mutual funds are operated by  management companies that are owned by third parties—either public or  private stockholders—and not by the funds they serve.   | 
| Plain Talk About Distributions | 
| As a shareholder, you are entitled to your portion of a fund’s income from  interest and dividends as well as capital gains from the fund’s sale of  investments. Income consists of both the dividends that the fund earns from  any stock holdings and the interest it receives from any money market and  bond investments. Capital gains are realized whenever the fund sells  securities for higher prices than it paid for them. These capital gains are  either short-term or long-term, depending on whether the fund held the  securities for one year or less or for more than one year. | 
| Plain Talk About Buying a Dividend | 
| Unless you are a tax-exempt investor or investing through a tax-advantaged  account (such as an IRA or an employer-sponsored retirement or savings  plan), you should consider avoiding a purchase of fund shares shortly before  the fund makes a distribution, because doing so can cost you money in  taxes. This is known as “buying a dividend.” For example: On December 15,  you invest $5,000, buying 250 shares for $20 each. If the fund pays a  distribution of $1 per share on December 16, its share price will drop to $19  (not counting market change). You still have only $5,000 (250 shares x $19 =  $4,750 in share value, plus 250 shares x $1 = $250 in distributions), but you  owe tax on the $250 distribution you received—even if you reinvest it in more  shares. To avoid buying a dividend, check a fund’s distribution schedule  before you invest. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $354.11 | $439.83 | $346.57 | $298.14 | $231.44 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 6.404 | 6.000 | 5.326 | 5.427 | 5.319 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 85.843 | (85.767) | 93.371 | 48.314 | 66.962 | 
| Total from Investment Operations | 92.247 | (79.767) | 98.697 | 53.741 | 72.281 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (6.367) | (5.953) | (5.437) | (5.311) | (5.581) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (6.367) | (5.953) | (5.437) | (5.311) | (5.581) | 
| Net Asset Value, End of Period | $439.99 | $354.11 | $439.83 | $346.57 | $298.14 | 
| Total Return2 | 26.24% | -18.15% | 28.66% | 18.37% | 31.46% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $456,812 | $367,498 | $453,239 | $359,553 | $319,624 | 
| Ratio of Total Expenses to Average Net Assets | 0.04%3 | 0.04%3 | 0.04% | 0.04% | 0.04% | 
| Ratio of Net Investment Income to Average Net  Assets | 1.62% | 1.58% | 1.35% | 1.83% | 1.97% | 
| Portfolio Turnover Rate4 | 2% | 2% | 2% | 4% | 4% | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.04%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
| Web |  | 
| Vanguard.com | For the most complete source of Vanguard news   For fund, account, and service information   For most account transactions   For literature requests   24 hours a day, 7 days a week | 
| Phone | |
| Investor Information 800-662-7447 (Text telephone for people with  hearing impairment at 800-749-7273) | For fund and service information For literature requests | 
| Client Services 800-662-2739 (Text telephone for people with  hearing impairment at 800-749-7273) | For account information For most account transactions | 
| Participant Services 800-523-1188 (Text telephone for people with  hearing impairment at 800-749-7273) | For information and services for participants in  employer-sponsored plans | 
| Institutional Division 888-809-8102 | For information and services for large institutional  investors | 
| Financial Advisor and Intermediary Sales Support 800-997-2798 | For information and services for financial intermediaries  including financial advisors, broker-dealers, trust  institutions, and insurance companies | 
| Financial Advisory and Intermediary  Trading Support 800-669-0498 | For account information and trading support for  financial intermediaries including financial advisors,  broker-dealers, trust institutions, and insurance  companies   | 
| Vanguard Fund | Inception   Date | Newspaper Abbreviation | Vanguard Fund Number | CUSIP Number | 
| Vanguard 500 Index Fund | ||||
| Admiral Shares | 11/13/2000 | 500Adml | 540 | 922908710 | 
 
  
 |  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | Since   Fund   Inception | Fund   Inception   Date | 
| Vanguard 500 Index Fund Institutional  Select Shares |  |  |  |  | 
| Return Before Taxes | % | % | % |  | 
| Return After Taxes on Distributions |  |  |  |  | 
| Return After Taxes on Distributions and Sale  of Fund Shares |  |  |  |  | 
| Standard & Poor’s 500 Index (reflects no deduction for fees, expenses,  or taxes) | % | % | % |  | 
| Dow Jones U.S. Total Stock Market Float  Adjusted Index (reflects no deduction for fees, expenses,  or taxes) |  |  |  |  | 
 symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether the Fund is the right investment for you. We suggest that you keep this prospectus for future reference.
  symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether the Fund is the right investment for you. We suggest that you keep this prospectus for future reference.| Plain Talk About Fund Expenses | 
| All mutual funds have operating expenses. These expenses, which are  deducted from a fund’s gross income, are expressed as a percentage of the  net assets of the fund. Assuming that operating expenses remain as stated in  the Fees and Expenses section, Vanguard 500 Index Fund Institutional  Select Shares’ expense ratio would be 0.01%, or $0.10 per $1,000 of  average net assets. The average expense ratio for large-cap core funds in  2023 was 0.88%, or $8.80 per $1,000 of average net assets (derived from  data provided by Lipper, a Thomson Reuters Company, which reports on the  mutual fund industry). | 
| Plain Talk About Costs of Investing | 
| Costs are an important consideration in choosing a mutual fund. That is  because you, as a shareholder, pay a proportionate share of the costs of  operating a fund and any transaction costs incurred when the fund buys or  sells securities, including costs generated by shareholders of other share  classes offered by the fund. These costs can erode a substantial portion of  the gross income or the capital appreciation a fund achieves. Even  seemingly small differences in expenses can, over time, have a dramatic  effect on a fund’s performance. | 
 
  
  
 | Plain Talk About Vanguard’s Unique Corporate Structure | 
| Vanguard is owned jointly by the funds it oversees and thus indirectly by the  shareholders in those funds. Most other mutual funds are operated by  management companies that are owned by third parties—either public or  private stockholders—and not by the funds they serve. | 
| Plain Talk About Distributions | 
| As a shareholder, you are entitled to your portion of a fund’s income from  interest and dividends as well as capital gains from the fund’s sale of  investments. Income consists of both the dividends that the fund earns from  any stock holdings and the interest it receives from any money market and  bond investments. Capital gains are realized whenever the fund sells  securities for higher prices than it paid for them. These capital gains are  either short-term or long-term, depending on whether the fund held the  securities for one year or less or for more than one year. | 
| Plain Talk About Buying a Dividend | 
| Unless you are investing through a tax-advantaged account (such as a  401(k) plan), you should consider avoiding a purchase of fund shares shortly  before the fund makes a distribution, because doing so can cost you money  in taxes. This is known as “buying a dividend.” For example: On  December 15, you invest $5,000, buying 250 shares for $20 each. If the fund  pays a distribution of $1 per share on December 16, its share price will drop  to $19 (not counting market change). You still have only $5,000 (250 shares  x $19 = $4,750 in share value, plus 250 shares x $1 = $250 in distributions),  but you owe tax on the $250 distribution you received—even if you reinvest it  in more shares. To avoid buying a dividend, check a fund’s distribution  schedule before you invest.   | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $187.66 | $233.06 | $183.64 | $157.98 | $122.64 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 3.462 | 3.249 | 2.885 | 2.924 | 2.857 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 45.493 | (45.458) | 49.478 | 25.597 | 35.484 | 
| Total from Investment Operations | 48.955 | (42.209) | 52.363 | 28.521 | 38.341 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (3.395) | (3.191) | (2.943) | (2.861) | (3.001) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (3.395) | (3.191) | (2.943) | (2.861) | (3.001) | 
| Net Asset Value, End of Period | $233.22 | $187.66 | $233.06 | $183.64 | $157.98 | 
| Total Return | 26.28% | -18.13% | 28.70% | 18.40% | 31.49% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $148,309 | $111,968 | $118,481 | $94,870 | $81,230 | 
| Ratio of Total Expenses to Average Net Assets | 0.01%2 | 0.01%2 | 0.01% | 0.01% | 0.01% | 
| Ratio of Net Investment Income to Average Net  Assets | 1.65% | 1.62% | 1.38% | 1.86% | 2.00% | 
| Portfolio Turnover Rate3 | 2% | 2% | 2% | 4% | 4% | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.01%. | 
| 3 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units.   | 
| Web |  | 
| Vanguard.com | For the most complete source of Vanguard news   For fund, account, and service information   For most account transactions   For literature requests   24 hours a day, 7 days a week | 
| Phone | |
| Investor Information 800-662-7447 (Text telephone for people with  hearing impairment at 800-749-7273) | For fund and service information For literature requests | 
| Client Services 800-662-2739 (Text telephone for people with  hearing impairment at 800-749-7273) | For account information For most account transactions | 
| Participant Services 800-523-1188 (Text telephone for people with  hearing impairment at 800-749-7273) | For information and services for participants in  employer-sponsored plans | 
| Institutional Division 888-809-8102 | For information and services for large institutional  investors | 
| Financial Advisor and Intermediary Sales Support 800-997-2798 | For information and services for financial intermediaries  including financial advisors, broker-dealers, trust  institutions, and insurance companies | 
| Financial Advisory and Intermediary  Trading Support 800-669-0498 | For account information and trading support for  financial intermediaries including financial advisors,  broker-dealers, trust institutions, and insurance  companies | 
| Vanguard Fund | Inception   Date | Newspaper Abbreviation | Vanguard Fund Number | CUSIP Number | 
| Vanguard 500 Index Fund | ||||
| Institutional Select  Shares | 6/24/2016 (Investor Shares 8/31/1976) | Van500IxInstSel | 1940 | 922908348 | 
 
  
 |  | |
| Transaction Fee on Purchases and Sales |  | 
| Transaction Fee on Reinvested Dividends |  | 
| Transaction Fee on Conversion to ETF Shares |  | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard 500 Index Fund ETF Shares |  |  |  | 
| Based on NAV |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| Based on Market Price |  |  |  | 
| Return Before Taxes |  |  |  | 
| Standard & Poor’s 500 Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
 symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether the Fund is the right investment for you. We suggest that you keep this prospectus for future reference.
  symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether the Fund is the right investment for you. We suggest that you keep this prospectus for future reference.| Plain Talk About Fund Expenses | 
| All funds have operating expenses. These expenses, which are deducted  from a fund’s gross income, are expressed as a percentage of the net assets  of the fund. Assuming that operating expenses remain as stated in the Fees  and Expenses section, Vanguard 500 Index Fund ETF Shares’ expense ratio  would be 0.03%, or $0.30 per $1,000 of average net assets. The average  expense ratio for large-cap core funds in 2023 was 0.88%, or $8.80 per  $1,000 of average net assets (derived from data provided by Lipper, a  Thomson Reuters Company, which reports on the fund industry). | 
| Plain Talk About Costs of Investing | 
| Costs are an important consideration in choosing an ETF. That is because  you, as a shareholder, pay a proportionate share of the costs of operating a  fund and any transaction costs incurred when the fund buys or sells  securities, including costs generated by shareholders of other share classes  offered by the fund. These costs can erode a substantial portion of the gross  income or the capital appreciation a fund achieves. Even seemingly small  differences in expenses can, over time, have a dramatic effect on a  fund’s performance. | 
 
  
  
  
  
  
  
 | Plain Talk About Vanguard’s Unique Corporate Structure | 
| Vanguard is owned jointly by the funds it oversees and thus indirectly by the  shareholders in those funds. Most other mutual funds are operated by  management companies that are owned by third parties—either public or  private stockholders—and not by the funds they serve. | 
| Plain Talk About Distributions | 
| As a shareholder, you are entitled to your portion of a fund’s income from  interest and dividends as well as capital gains from the fund’s sale of  investments. Income consists of both the dividends that the fund earns from  any stock holdings and the interest it receives from any money market and  bond investments. Capital gains are realized whenever the fund sells  securities for higher prices than it paid for them. These capital gains are  either short-term or long-term, depending on whether the fund held the  securities for one year or less or for more than one year. | 
| Vanguard Fund | Inception Date | Vanguard Fund Number | CUSIP Number | 
| Vanguard 500 Index Fund | |||
| ETF Shares | 9/7/2010 (Investor Shares 8/31/1976) | 968 | 922908363 | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $351.41 | $436.47 | $343.93 | $295.87 | $229.68 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 6.412 | 6.012 | 5.353 | 5.413 | 5.298 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 85.165 | (85.125) | 92.624 | 47.950 | 66.463 | 
| Total from Investment Operations | 91.577 | (79.113) | 97.977 | 53.363 | 71.761 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (6.357) | (5.947) | (5.437) | (5.303) | (5.571) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (6.357) | (5.947) | (5.437) | (5.303) | (5.571) | 
| Net Asset Value, End of Period | $436.63 | $351.41 | $436.47 | $343.93 | $295.87 | 
| Total Return2 | 26.25% | -18.15% | 28.66% | 18.35% | 31.46% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $372,051 | $262,211 | $279,850 | $177,991 | $130,728 | 
| Ratio of Total Expenses to Average Net Assets | 0.03%3 | 0.03%3 | 0.03% | 0.03% | 0.03% | 
| Ratio of Net Investment Income to Average Net  Assets | 1.63% | 1.60% | 1.36% | 1.83% | 1.98% | 
| Portfolio Turnover Rate4 | 2% | 2% | 2% | 4% | 4% | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements were 0.03%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units.   | 
 
  
 |  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | Since   Fund   Inception | Fund   Inception   Date | 
| Vanguard Extended Market Index Fund  Institutional Select Shares |  |  |  |  | 
| Return Before Taxes | % | % | % |  | 
| Return After Taxes on Distributions |  |  |  |  | 
| Return After Taxes on Distributions and Sale  of Fund Shares |  |  |  |  | 
| Standard & Poor’s Completion Index (reflects no deduction for fees, expenses,  or taxes) | % | % | % |  | 
| Dow Jones U.S. Total Stock Market Float  Adjusted Index (reflects no deduction for fees, expenses,  or taxes) |  |  |  |  | 
 symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether the Fund is the right investment for you. We suggest that you keep this prospectus for future reference.
  symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether the Fund is the right investment for you. We suggest that you keep this prospectus for future reference.| Plain Talk About Costs of Investing | 
| Costs are an important consideration in choosing a mutual fund. That is  because you, as a shareholder, pay a proportionate share of the costs of  operating a fund and any transaction costs incurred when the fund buys or  sells securities, including costs generated by shareholders of other share  classes offered by the fund. These costs can erode a substantial portion of  the gross income or the capital appreciation a fund achieves. Even  seemingly small differences in expenses can, over time, have a dramatic  effect on a fund’s performance.   | 
 
  
  
 | Plain Talk About Vanguard’s Unique Corporate Structure | 
| Vanguard is owned jointly by the funds it oversees and thus indirectly by the  shareholders in those funds. Most other mutual funds are operated by  management companies that are owned by third parties—either public or  private stockholders—and not by the funds they serve.   | 
| Plain Talk About Distributions | 
| As a shareholder, you are entitled to your portion of a fund’s income from  interest as well as capital gains from the fund’s sale of investments. Income  consists of interest the fund earns from its money market and bond  investments. Capital gains are realized whenever the fund sells securities for  higher prices than it paid for them. These capital gains are either short-term  or long-term, depending on whether the fund held the securities for one year  or less or for more than one year.   | 
| Plain Talk About Buying a Dividend | 
| Unless you are investing through a tax-advantaged account (such as an IRA  or an employer sponsored retirement or savings plan), you should consider  avoiding a purchase of fund shares shortly before the fund makes a  distribution, because doing so can cost you money in taxes. This is known as  “buying a dividend.” For example: On December 15, you invest $5,000,  buying 250 shares for $20 each. If the fund pays a distribution of $1 per  share on December 16, its share price will drop to $19 (not counting market  change). You still have only $5,000 (250 shares x $19 = $4,750 in share  value, plus 250 shares x $1 = $250 in distributions), but you owe tax on the  $250 distribution you received—even if you reinvest it in more shares. To  avoid buying a dividend, check a fund’s distribution schedule before  you invest. | 
|  |  |  |  |  |  | 
| For a Share Outstanding Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $162.04 | $222.86 | $200.45 | $153.63 | $121.63 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 2.580 | 2.421 | 2.352 | 1.855 | 2.059 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 38.338 | (61.319) | 22.661 | 47.179 | 31.999 | 
| Total from Investment Operations | 40.918 | (58.898) | 25.013 | 49.034 | 34.058 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (2.588) | (1.922) | (2.603) | (2.214) | (2.058) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (2.588) | (1.922) | (2.603) | (2.214) | (2.058) | 
| Net Asset Value, End of Period | $200.37 | $162.04 | $222.86 | $200.45 | $153.63 | 
| Total Return | 25.44% | -26.44% | 12.50% | 32.27% | 28.09% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $28,375 | $22,239 | $26,240 | $24,472 | $19,166 | 
| Ratio of Total Expenses to Average Net Assets | 0.02%2 | 0.02%2 | 0.02% | 0.02% | 0.02% | 
| Ratio of Net Investment Income to Average Net  Assets | 1.46% | 1.36% | 1.05% | 1.22% | 1.44% | 
| Portfolio Turnover Rate3 | 11% | 11% | 19% | 19% | 13% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.02%. | 
| 3 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
| Web |  | 
| Vanguard.com | For the most complete source of Vanguard news   For fund, account, and service information   For most account transactions   For literature requests   24 hours a day, 7 days a week | 
| Phone | |
| Client Services 800-662-2739 (Text telephone for people with  hearing impairment at 800-749-7273) | For account information For most account transactions | 
| Participant Services 800-523-1188 (Text telephone for people with  hearing impairment at 800-749-7273) | For information and services for participants in  employer-sponsored plans | 
| Institutional Division 888-809-8102 | For information and services for large institutional  investors | 
| Financial Advisor and Intermediary Sales Support 800-997-2798 | For information and services for financial intermediaries  including financial advisors, broker-dealers, trust  institutions, and insurance companies | 
| Financial Advisory and Intermediary  Trading Support 800-669-0498 | For account information and trading support for  financial intermediaries including financial advisors,  broker-dealers, trust institutions, and insurance  companies | 
| Vanguard Fund | Inception Date | Newspaper Abbreviation | Vanguard Fund Number | CUSIP Number | 
| Vanguard Extended Market Index Fund | ||||
| Institutional Select  Shares | 6/27/2016 (Institutional Shares 7/7/1997) | VanExMtIxInsSel | 1898 | 922908322 | 
 
  
 |  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Total Stock Market Index Fund Investor Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Total Market Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Large-Cap Index Fund Investor Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Large Cap Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Value Index Fund Investor Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Large Cap Value Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Growth Index Fund Investor Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Large Cap Growth Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
 symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether a Fund is the right investment for you. We suggest that you keep this prospectus for future reference.
  symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether a Fund is the right investment for you. We suggest that you keep this prospectus for future reference.| Plain Talk About Costs of Investing | 
| Costs are an important consideration in choosing a mutual fund. That is  because you, as a shareholder, pay a proportionate share of the costs of  operating a fund and any transaction costs incurred when the fund buys or  sells securities, including costs generated by shareholders of other share  classes offered by the fund. These costs can erode a substantial portion of  the gross income or the capital appreciation a fund achieves. Even  seemingly small differences in expenses can, over time, have a dramatic  effect on a fund’s performance.   | 
 
 | Vanguard Fund | Asset-Weighted Median Market Capitalization | 
| Vanguard Total Stock Market Index Fund | $149 billion | 
| Vanguard Large-Cap Index Fund | 199 billion | 
| Vanguard Value Index Fund | 121 billion | 
| Vanguard Growth Index Fund | 790 billion | 
 
 | Plain Talk About Growth Funds and Value Funds | 
| Growth investing and value investing are two styles employed by stock-fund  managers. Growth funds generally invest in stocks of companies believed to  have above-average potential for growth in revenue, earnings, cash flow, or  other similar criteria. These stocks typically have low dividend yields, if any,  and above-average prices in relation to measures such as earnings and book  value. Value funds typically invest in stocks whose prices are below average  in relation to those measures; these stocks often have above-average  dividend yields. Value stocks also may remain undervalued by the market for  long periods of time. Growth and value stocks have historically produced  similar long-term returns, though each category has periods when it  outperforms the other. | 
 
  
  
  
 | Plain Talk About Vanguard’s Unique Corporate Structure | 
| Vanguard is owned jointly by the funds it oversees and thus indirectly by the  shareholders in those funds. Most other mutual funds are operated by  management companies that are owned by third parties—either public or  private stockholders—and not by the funds they serve. | 
| Plain Talk About Distributions | 
| As a shareholder, you are entitled to your portion of a fund’s income from  interest and dividends as well as capital gains from the fund’s sale of  investments. Income consists of both the dividends that the fund earns from  any stock holdings and the interest it receives from any money market and  bond investments. Capital gains are realized whenever the fund sells  securities for higher prices than it paid for them. These capital gains are  either short-term or long-term, depending on whether the fund held the  securities for one year or less or for more than one year. | 
| Plain Talk About Buying a Dividend | 
| Unless you are a tax-exempt investor or investing through a tax-advantaged  account (such as an IRA or an employer-sponsored retirement or savings  plan), you should consider avoiding a purchase of fund shares shortly before  the fund makes a distribution, because doing so can cost you money in  taxes. This is known as “buying a dividend.” For example: On December 15,  you invest $5,000, buying 250 shares for $20 each. If the fund pays a  distribution of $1 per share on December 16, its share price will drop to $19  (not counting market change). You still have only $5,000 (250 shares x $19 =  $4,750 in share value, plus 250 shares x $1 = $250 in distributions), but you  owe tax on the $250 distribution you received—even if you reinvest it in more  shares. To avoid buying a dividend, check a fund’s distribution schedule  before you invest.   | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $93.09 | $117.53 | $94.71 | $79.66 | $62.08 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 1.536 | 1.335 | 1.284 | 1.284 | 1.279 | 
| Capital Gain Distributions Received | .0001,2 | .0001,2 | .0001,2 | — | — | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 22.401 | (24.344) | 22.837 | 15.026 | 17.634 | 
| Total from Investment Operations | 23.937 | (23.009) | 24.121 | 16.310 | 18.913 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (1.547) | (1.431) | (1.301) | (1.260) | (1.333) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (1.547) | (1.431) | (1.301) | (1.260) | (1.333) | 
| Net Asset Value, End of Period | $115.48 | $93.09 | $117.53 | $94.71 | $79.66 | 
| Total Return3 | 25.89% | -19.60% | 25.59% | 20.87% | 30.65% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $20,443 | $18,409 | $133,977 | $153,845 | $139,686 | 
| Ratio of Total Expenses to Average Net Assets | 0.14%4 | 0.14%4 | 0.14% | 0.14% | 0.14% | 
| Ratio of Net Investment Income to Average Net  Assets | 1.48% | 1.28% | 1.20% | 1.62% | 1.78% | 
| Portfolio Turnover Rate5 | 2% | 3% | 4% | 8% | 4% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Distribution was less than $.001 per share. | 
| 3 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 4 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.14%. | 
| 5 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $70.38 | $89.03 | $71.00 | $59.72 | $46.36 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 1.142 | 1.058 | .956 | .969 | .918 | 
| Net Realized and Unrealized Gain (Loss) on Investments | 17.823 | (18.646) | 18.025 | 11.268 | 13.466 | 
| Total from Investment Operations | 18.965 | (17.588) | 18.981 | 12.237 | 14.384 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (1.145) | (1.062) | (.951) | (.957) | (1.024) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (1.145) | (1.062) | (.951) | (.957) | (1.024) | 
| Net Asset Value, End of Period | $88.20 | $70.38 | $89.03 | $71.00 | $59.72 | 
| Total Return2 | 27.12% | -19.78% | 26.87% | 20.89% | 31.23% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $23 | $17 | $36 | $37 | $30 | 
| Ratio of Total Expenses to Average Net Assets | 0.17%3 | 0.17%3 | 0.17% | 0.17% | 0.17% | 
| Ratio of Net Investment Income to Average Net Assets | 1.44% | 1.38% | 1.19% | 1.61% | 1.75% | 
| Portfolio Turnover Rate4 | 2% | 3% | 4% | 3% | 5% | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.17%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $54.78 | $57.39 | $46.43 | $46.78 | $38.18 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 1.332 | 1.301 | 1.177 | 1.142 | 1.093 | 
| Net Realized and Unrealized Gain (Loss) on Investments | 3.557 | (2.604) | 10.945 | (.362) | 8.623 | 
| Total from Investment Operations | 4.889 | (1.303) | 12.122 | .780 | 9.716 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (1.359) | (1.307) | (1.162) | (1.130) | (1.116) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (1.359) | (1.307) | (1.162) | (1.130) | (1.116) | 
| Net Asset Value, End of Period | $58.31 | $54.78 | $57.39 | $46.43 | $46.78 | 
| Total Return2 | 9.11% | -2.18% | 26.31% | 2.18% | 25.67% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $147 | $233 | $264 | $273 | $328 | 
| Ratio of Total Expenses to Average Net Assets | 0.17%3 | 0.17%3 | 0.17% | 0.17% | 0.17% | 
| Ratio of Net Investment Income to Average Net Assets | 2.43% | 2.38% | 2.22% | 2.75% | 2.58% | 
| Portfolio Turnover Rate4 | 10% | 5% | 9% | 10% | 12% | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.17%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $109.76 | $165.20 | $130.50 | $93.87 | $69.10 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | .735 | .638 | .565 | .728 | .746 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 50.316 | (55.480) | 34.731 | 36.631 | 24.802 | 
| Total from Investment Operations | 51.051 | (54.842) | 35.296 | 37.359 | 25.548 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (.751) | (.598) | (.596) | (.729) | (.778) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (.751) | (.598) | (.596) | (.729) | (.778) | 
| Net Asset Value, End of Period | $160.06 | $109.76 | $165.20 | $130.50 | $93.87 | 
| Total Return2 | 46.60% | -33.22% | 27.10% | 40.01% | 37.08% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $415 | $345 | $692 | $750 | $572 | 
| Ratio of Total Expenses to Average Net Assets | 0.17%3 | 0.17%3 | 0.17% | 0.17% | 0.17% | 
| Ratio of Net Investment Income to Average Net Assets | 0.54% | 0.50% | 0.39% | 0.69% | 0.92% | 
| Portfolio Turnover Rate4 | 5% | 5% | 8% | 6% | 11% | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.17%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
| Web |  | 
| Vanguard.com | For the most complete source of Vanguard news   For fund, account, and service information   For most account transactions   For literature requests   24 hours a day, 7 days a week | 
| Phone | |
| Investor Information 800-662-7447 (Text telephone for people with  hearing impairment at 800-749-7273) | For fund and service information For literature requests | 
| Client Services 800-662-2739 (Text telephone for people with  hearing impairment at 800-749-7273) | For account information For most account transactions | 
| Participant Services 800-523-1188 (Text telephone for people with  hearing impairment at 800-749-7273) | For information and services for participants in  employer-sponsored plans | 
| Institutional Division 888-809-8102 | For information and services for large institutional  investors | 
| Financial Advisor and Intermediary Sales Support 800-997-2798 | For information and services for financial intermediaries  including financial advisors, broker-dealers, trust  institutions, and insurance companies | 
| Financial Advisory and Intermediary  Trading Support 800-669-0498 | For account information and trading support for  financial intermediaries including financial advisors,  broker-dealers, trust institutions, and insurance  companies | 
| Vanguard Fund | Inception   Date | Newspaper Abbreviation | Vanguard Fund Number | CUSIP Number | 
| Vanguard Total Stock Market Index Fund | ||||
| Investor Shares | 4/27/1992 | TotSt | 85 | 922908306 | 
| Vanguard Large-Cap Index Fund | ||||
| Investor Shares | 1/30/2004 | LarCapIx | 307 | 922908587 | 
| Vanguard Value Index Fund | ||||
| Investor Shares | 11/2/1992 | Value | 06 | 922908405 | 
| Vanguard Growth Index Fund |  |  |  |  | 
| Investor Shares | 11/2/1992 | Growth | 09 | 922908504 | 
|  |  |  |  |  | 
 
  
 |  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Total Stock Market Index Fund Admiral Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Total Market Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Large-Cap Index Fund Admiral Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Large Cap Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Value Index Fund Admiral Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Large Cap Value Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Growth Index Fund Admiral Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Large Cap Growth Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
 symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether a Fund is the right investment for you. We suggest that you keep this prospectus for future reference.
  symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether a Fund is the right investment for you. We suggest that you keep this prospectus for future reference.| Plain Talk About Costs of Investing | 
| Costs are an important consideration in choosing a mutual fund. That is  because you, as a shareholder, pay a proportionate share of the costs of  operating a fund and any transaction costs incurred when the fund buys or  sells securities, including costs generated by shareholders of other share  classes offered by the fund. These costs can erode a substantial portion of  the gross income or the capital appreciation a fund achieves. Even  seemingly small differences in expenses can, over time, have a dramatic  effect on a fund’s performance.   | 
 
 | Vanguard Fund | Asset-Weighted Median Market Capitalization | 
| Vanguard Total Stock Market Index Fund | $149 billion | 
| Vanguard Large-Cap Index Fund | 199 billion | 
| Vanguard Value Index Fund | 121 billion | 
| Vanguard Growth Index Fund | 790 billion | 
 
 | Plain Talk About Growth Funds and Value Funds | 
| Growth investing and value investing are two styles employed by stock-fund  managers. Growth funds generally invest in stocks of companies believed to  have above-average potential for growth in revenue, earnings, cash flow, or  other similar criteria. These stocks typically have low dividend yields, if any,  and above-average prices in relation to measures such as earnings and book  value. Value funds typically invest in stocks whose prices are below average  in relation to those measures; these stocks often have above-average  dividend yields. Value stocks also may remain undervalued by the market for  long periods of time. Growth and value stocks have historically produced  similar long-term returns, though each category has periods when it  outperforms the other. | 
 
  
  
  
 | Plain Talk About Vanguard’s Unique Corporate Structure | 
| Vanguard is owned jointly by the funds it oversees and thus indirectly by the  shareholders in those funds. Most other mutual funds are operated by  management companies that are owned by third parties—either public or  private stockholders—and not by the funds they serve. | 
| Plain Talk About Distributions | 
| As a shareholder, you are entitled to your portion of a fund’s income from  interest and dividends as well as capital gains from the fund’s sale of  investments. Income consists of both the dividends that the fund earns from  any stock holdings and the interest it receives from any money market and  bond investments. Capital gains are realized whenever the fund sells  securities for higher prices than it paid for them. These capital gains are  either short-term or long-term, depending on whether the fund held the  securities for one year or less or for more than one year. | 
| Plain Talk About Buying a Dividend | 
| Unless you are a tax-exempt investor or investing through a tax-advantaged  account (such as an IRA or an employer-sponsored retirement or savings  plan), you should consider avoiding a purchase of fund shares shortly before  the fund makes a distribution, because doing so can cost you money in  taxes. This is known as “buying a dividend.” For example: On December 15,  you invest $5,000, buying 250 shares for $20 each. If the fund pays a  distribution of $1 per share on December 16, its share price will drop to $19  (not counting market change). You still have only $5,000 (250 shares x $19 =  $4,750 in share value, plus 250 shares x $1 = $250 in distributions), but you  owe tax on the $250 distribution you received—even if you reinvest it in more  shares. To avoid buying a dividend, check a fund’s distribution schedule  before you invest.   | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $93.10 | $117.56 | $94.74 | $79.69 | $62.09 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 1.645 | 1.540 | 1.402 | 1.364 | 1.360 | 
| Capital Gain Distributions Received | .0001,2 | .0001,2 | .0001,2 | — | — | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 22.396 | (24.460) | 22.833 | 15.025 | 17.646 | 
| Total from Investment Operations | 24.041 | (22.920) | 24.235 | 16.389 | 19.006 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (1.651) | (1.540) | (1.415) | (1.339) | (1.406) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (1.651) | (1.540) | (1.415) | (1.339) | (1.406) | 
| Net Asset Value, End of Period | $115.49 | $93.10 | $117.56 | $94.74 | $79.69 | 
| Total Return3 | 26.01% | -19.53% | 25.71% | 20.99% | 30.80% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $340,379 | $274,489 | $341,733 | $273,622 | $252,536 | 
| Ratio of Total Expenses to Average Net Assets | 0.04%4 | 0.04%4 | 0.04% | 0.04% | 0.04% | 
| Ratio of Net Investment Income to Average Net  Assets | 1.59% | 1.54% | 1.30% | 1.72% | 1.88% | 
| Portfolio Turnover Rate5 | 2% | 3% | 4% | 8% | 4% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Distribution was less than $.001 per share. | 
| 3 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 4 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.04%. | 
| 5 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $87.98 | $111.33 | $88.79 | $74.69 | $57.96 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 1.544 | 1.456 | 1.325 | 1.303 | 1.299 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 22.293 | (23.348) | 22.530 | 14.084 | 16.774 | 
| Total from Investment Operations | 23.837 | (21.892) | 23.855 | 15.387 | 18.073 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (1.547) | (1.458) | (1.315) | (1.287) | (1.343) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (1.547) | (1.458) | (1.315) | (1.287) | (1.343) | 
| Net Asset Value, End of Period | $110.27 | $87.98 | $111.33 | $88.79 | $74.69 | 
| Total Return2 | 27.28% | -19.70% | 27.01% | 21.03% | 31.39% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $11,953 | $9,583 | $11,847 | $9,338 | $7,546 | 
| Ratio of Total Expenses to Average Net Assets | 0.05%3 | 0.05%3 | 0.05% | 0.05% | 0.05% | 
| Ratio of Net Investment Income to Average Net Assets | 1.56% | 1.54% | 1.32% | 1.73% | 1.92% | 
| Portfolio Turnover Rate4 | 2% | 3% | 4% | 3% | 5% | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.05%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $54.76 | $57.38 | $46.41 | $46.77 | $38.17 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 1.427 | 1.370 | 1.245 | 1.188 | 1.185 | 
| Net Realized and Unrealized Gain (Loss) on Investments | 3.529 | (2.618) | 10.951 | (.367) | 8.581 | 
| Total from Investment Operations | 4.956 | (1.248) | 12.196 | .821 | 9.766 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (1.426) | (1.372) | (1.226) | (1.181) | (1.166) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (1.426) | (1.372) | (1.226) | (1.181) | (1.166) | 
| Net Asset Value, End of Period | $58.29 | $54.76 | $57.38 | $46.41 | $46.77 | 
| Total Return2 | 9.24% | -2.08% | 26.49% | 2.29% | 25.82% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $33,518 | $32,071 | $31,741 | $22,486 | $22,414 | 
| Ratio of Total Expenses to Average Net Assets | 0.05%3 | 0.05%3 | 0.05% | 0.05% | 0.05% | 
| Ratio of Net Investment Income to Average Net Assets | 2.60% | 2.51% | 2.34% | 2.86% | 2.75% | 
| Portfolio Turnover Rate4 | 10% | 5% | 9% | 10% | 12% | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.05%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $109.72 | $165.15 | $130.46 | $93.84 | $69.09 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | .905 | .799 | .748 | .855 | .907 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 50.289 | (55.471) | 34.720 | 36.621 | 24.728 | 
| Total from Investment Operations | 51.194 | (54.672) | 35.468 | 37.476 | 25.635 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (.914) | (.758) | (.778) | (.856) | (.885) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (.914) | (.758) | (.778) | (.856) | (.885) | 
| Net Asset Value, End of Period | $160.00 | $109.72 | $165.15 | $130.46 | $93.84 | 
| Total Return2 | 46.77% | -33.14% | 27.26% | 40.19% | 37.23% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $67,555 | $45,295 | $68,372 | $53,928 | $38,103 | 
| Ratio of Total Expenses to Average Net Assets | 0.05%3 | 0.05%3 | 0.05% | 0.05% | 0.05% | 
| Ratio of Net Investment Income to Average Net Assets | 0.66% | 0.63% | 0.51% | 0.80% | 1.08% | 
| Portfolio Turnover Rate4 | 5% | 5% | 8% | 6% | 11% | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.05%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
| Web |  | 
| Vanguard.com | For the most complete source of Vanguard news   For fund, account, and service information   For most account transactions   For literature requests   24 hours a day, 7 days a week | 
| Phone | |
| Investor Information 800-662-7447 (Text telephone for people with  hearing impairment at 800-749-7273) | For fund and service information For literature requests | 
| Client Services 800-662-2739 (Text telephone for people with  hearing impairment at 800-749-7273) | For account information For most account transactions | 
| Participant Services 800-523-1188 (Text telephone for people with  hearing impairment at 800-749-7273) | For information and services for participants in  employer-sponsored plans | 
| Institutional Division 888-809-8102 | For information and services for large institutional  investors | 
| Financial Advisor and Intermediary Sales Support 800-997-2798 | For information and services for financial intermediaries  including financial advisors, broker-dealers, trust  institutions, and insurance companies | 
| Financial Advisory and Intermediary  Trading Support 800-669-0498 | For account information and trading support for  financial intermediaries including financial advisors,  broker-dealers, trust institutions, and insurance  companies | 
| Vanguard Fund | Inception Date | Newspaper Abbreviation | Vanguard Fund Number | CUSIP Number | 
| Vanguard Total Stock Market Index Fund | ||||
| Admiral Shares | 11/13/2000 | TotStAdml | 585 | 922908728 | 
| Vanguard Large-Cap Index  Fund |  |  |  |  | 
| Admiral Shares | 2/2/2024 | LaCapAd | 5307 | 922908579 | 
| Vanguard Value Index Fund | ||||
| Admiral Shares | 11/13/2000 | ValAdml | 506 | 922908678 | 
| Vanguard Growth Index Fund |  |  |  |  | 
| Admiral Shares | 11/13/2000 | GrwthAdml | 509 | 922908660 | 
|  |  |  |  |  | 
 
  
 |  | Institutional Shares | Institutional Plus Shares | 
| Sales Charge (Load) Imposed on Purchases |  |  | 
| Purchase Fee |  |  | 
| Sales Charge (Load) Imposed on Reinvested  Dividends |  |  | 
| Redemption Fee |  |  | 
|  | Institutional Shares | Institutional Plus Shares | 
| Management Fees | % |  | 
| 12b-1 Distribution Fee |  |  | 
| Other Expenses | % |  | 
| Total Annual Fund Operating Expenses | % |  | 
|  | 1 Year | 3 Years | 5 Years | 10 Years | 
| Institutional Shares | $ | $ | $ | $ | 
| Institutional Plus Shares | $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Total Stock Market Index Fund  Institutional Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Total Market Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | 1 Year | 5 Years | Since   Fund   Inception | Fund   Inception   Date | 
| Vanguard Total Stock Market Index Fund  Institutional Plus Shares |  |  |  |  | 
| Return Before Taxes | % | % | % |  | 
| CRSP US Total Market Index (reflects no deduction for fees, expenses,  or taxes) | % | % | % |  | 
| Dow Jones U.S. Total Stock Market Float  Adjusted Index (reflects no deduction for fees, expenses,  or taxes) |  |  |  |  | 
|  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Large-Cap Index Fund Institutional Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Large Cap Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Value Index Fund Institutional Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Large Cap Value Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Growth Index Fund Institutional Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Large Cap Growth Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
 symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether a Fund is the right investment for you. We suggest that you keep this prospectus for future reference.
  symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether a Fund is the right investment for you. We suggest that you keep this prospectus for future reference.| Plain Talk About Costs of Investing | 
| Costs are an important consideration in choosing a mutual fund. That is  because you, as a shareholder, pay a proportionate share of the costs of  operating a fund and any transaction costs incurred when the fund buys or  sells securities, including costs generated by shareholders of other share  classes offered by the fund. These costs can erode a substantial portion of  the gross income or the capital appreciation a fund achieves. Even  seemingly small differences in expenses can, over time, have a dramatic  effect on a fund’s performance.   | 
 
 | Vanguard Fund | Asset-Weighted Median Market Capitalization | 
| Vanguard Total Stock Market Index Fund | $149 billion | 
| Vanguard Large-Cap Index Fund | 199 billion | 
| Vanguard Value Index Fund | 121 billion | 
| Vanguard Growth Index Fund | 790 billion | 
 
 | Plain Talk About Growth Funds and Value Funds | 
| Growth investing and value investing are two styles employed by stock-fund  managers. Growth funds generally invest in stocks of companies believed to  have above-average potential for growth in revenue, earnings, cash flow, or  other similar criteria. These stocks typically have low dividend yields, if any,  and above-average prices in relation to measures such as earnings and book  value. Value funds typically invest in stocks whose prices are below average  in relation to those measures; these stocks often have above-average  dividend yields. Value stocks also may remain undervalued by the market for  long periods of time. Growth and value stocks have historically produced  similar long-term returns, though each category has periods when it  outperforms the other. | 
 
  
  
  
 | Plain Talk About Vanguard’s Unique Corporate Structure | 
| Vanguard is owned jointly by the funds it oversees and thus indirectly by the  shareholders in those funds. Most other mutual funds are operated by  management companies that are owned by third parties—either public or  private stockholders—and not by the funds they serve. | 
| Plain Talk About Distributions | 
| As a shareholder, you are entitled to your portion of a fund’s income from  interest as well as capital gains from the fund’s sale of investments. Income  consists of interest the fund earns from its money market and bond  investments. The portion of such dividends that is exempt from federal  income tax will be designated as “exempt-interest dividends.” Capital gains  are realized whenever the fund sells securities for higher prices than it paid  for them. These capital gains are either short-term or long-term, depending  on whether the fund held the securities for one year or less or for more than  one year. | 
| Plain Talk About Buying a Dividend | 
| Unless you are a tax-exempt investor or investing through a tax-advantaged  account (such as an IRA or an employer-sponsored retirement or savings  plan), you should consider avoiding a purchase of fund shares shortly before  the fund makes a distribution, because doing so can cost you money in  taxes. This is known as “buying a dividend.” For example: On December 15,  you invest $5,000, buying 250 shares for $20 each. If the fund pays a  distribution of $1 per share on December 16, its share price will drop to $19  (not counting market change). You still have only $5,000 (250 shares x $19 =  $4,750 in share value, plus 250 shares x $1 = $250 in distributions), but you  owe tax on the $250 distribution you received—even if you reinvest it in more  shares. To avoid buying a dividend, check a fund’s distribution schedule  before you invest.   | 
|  |  |  |  |  |  | 
| For a Share Outstanding Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $93.12 | $117.58 | $94.75 | $79.70 | $62.10 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 1.655 | 1.497 | 1.416 | 1.374 | 1.365 | 
| Capital Gain Distributions Received | .0001,2 | .0001,2 | .0001,2 | — | — | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 22.397 | (24.407) | 22.841 | 15.024 | 17.649 | 
| Total from Investment Operations | 24.052 | (22.910) | 24.257 | 16.398 | 19.014 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (1.662) | (1.550) | (1.427) | (1.348) | (1.414) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (1.662) | (1.550) | (1.427) | (1.348) | (1.414) | 
| Net Asset Value, End of Period | $115.51 | $93.12 | $117.58 | $94.75 | $79.70 | 
| Total Return | 26.02% | -19.51% | 25.73% | 21.00% | 30.81% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $81,389 | $66,751 | $249,282 | $180,586 | $152,716 | 
| Ratio of Total Expenses to Average Net Assets | 0.03%3 | 0.03%3 | 0.03% | 0.03% | 0.03% | 
| Ratio of Net Investment Income to Average Net  Assets | 1.60% | 1.46% | 1.31% | 1.73% | 1.89% | 
| Portfolio Turnover Rate4 | 2% | 3% | 4% | 8% | 4% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Distribution was less than $.001 per share. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.03%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units.   | 
|  |  |  |  |  |  | 
| For a Share Outstanding Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $174.63 | $220.49 | $177.69 | $149.47 | $116.46 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 3.123 | 2.960 | 2.672 | 2.591 | 2.575 | 
| Capital Gain Distributions Received | .0001,2 | .0001,2 | .0001,2 | — | — | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 42.014 | (45.906) | 42.823 | 28.172 | 33.100 | 
| Total from Investment Operations | 45.137 | (42.946) | 45.495 | 30.763 | 35.675 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (3.117) | (2.914) | (2.695) | (2.543) | (2.665) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (3.117) | (2.914) | (2.695) | (2.543) | (2.665) | 
| Net Asset Value, End of Period | $216.65 | $174.63 | $220.49 | $177.69 | $149.47 | 
| Total Return | 26.03% | -19.51% | 25.74% | 21.02% | 30.82% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $607,188 | $488,093 | $296,554 | $226,288 | $188,188 | 
| Ratio of Total Expenses to Average Net Assets | 0.02%3 | 0.02%3 | 0.02% | 0.02% | 0.02% | 
| Ratio of Net Investment Income to Average Net  Assets | 1.61% | 1.59% | 1.32% | 1.74% | 1.90% | 
| Portfolio Turnover Rate4 | 2% | 3% | 4% | 8% | 4% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Distribution was less than $.001 per share. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.02%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $362.12 | $458.22 | $365.43 | $307.39 | $238.57 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 6.401 | 6.032 | 5.477 | 5.389 | 5.363 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 91.727 | (96.092) | 92.764 | 57.981 | 69.016 | 
| Total from Investment Operations | 98.128 | (90.060) | 98.241 | 63.370 | 74.379 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (6.408) | (6.040) | (5.451) | (5.330) | (5.559) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (6.408) | (6.040) | (5.451) | (5.330) | (5.559) | 
| Net Asset Value, End of Period | $453.84 | $362.12 | $458.22 | $365.43 | $307.39 | 
| Total Return | 27.28% | -19.69% | 27.03% | 21.05% | 31.39% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $2,648 | $2,071 | $2,524 | $2,149 | $1,796 | 
| Ratio of Total Expenses to Average Net Assets | 0.04%2 | 0.04%2 | 0.04% | 0.04% | 0.04% | 
| Ratio of Net Investment Income to Average Net  Assets | 1.57% | 1.55% | 1.32% | 1.74% | 1.92% | 
| Portfolio Turnover Rate3 | 2% | 3% | 4% | 3% | 5% | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.04%. | 
| 3 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $54.76 | $57.37 | $46.41 | $46.77 | $38.17 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 1.429 | 1.377 | 1.250 | 1.193 | 1.189 | 
| Net Realized and Unrealized Gain (Loss) on Investments | 3.533 | (2.609) | 10.941 | (.368) | 8.581 | 
| Total from Investment Operations | 4.962 | (1.232) | 12.191 | .825 | 9.770 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (1.432) | (1.378) | (1.231) | (1.185) | (1.170) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (1.432) | (1.378) | (1.231) | (1.185) | (1.170) | 
| Net Asset Value, End of Period | $58.29 | $54.76 | $57.37 | $46.41 | $46.77 | 
| Total Return | 9.26% | -2.05% | 26.48% | 2.30% | 25.83% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $16,183 | $16,452 | $15,446 | $12,579 | $12,481 | 
| Ratio of Total Expenses to Average Net Assets | 0.04%2 | 0.04%2 | 0.04% | 0.04% | 0.04% | 
| Ratio of Net Investment Income to Average Net Assets | 2.60% | 2.52% | 2.35% | 2.87% | 2.76% | 
| Portfolio Turnover Rate3 | 10% | 5% | 9% | 10% | 12% | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.04%. | 
| 3 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $109.72 | $165.16 | $130.47 | $93.85 | $69.09 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | .920 | .812 | .762 | .867 | .912 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 50.288 | (55.481) | 34.721 | 36.620 | 24.742 | 
| Total from Investment Operations | 51.208 | (54.669) | 35.483 | 37.487 | 25.654 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (.928) | (.771) | (.793) | (.867) | (.894) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (.928) | (.771) | (.793) | (.867) | (.894) | 
| Net Asset Value, End of Period | $160.00 | $109.72 | $165.16 | $130.47 | $93.85 | 
| Total Return | 46.78% | -33.14% | 27.27% | 40.20% | 37.26% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $28,096 | $18,465 | $27,688 | $22,582 | $16,426 | 
| Ratio of Total Expenses to Average Net Assets | 0.04%2 | 0.04%2 | 0.04% | 0.04% | 0.04% | 
| Ratio of Net Investment Income to Average Net Assets | 0.67% | 0.64% | 0.52% | 0.82% | 1.09% | 
| Portfolio Turnover Rate3 | 5% | 5% | 8% | 6% | 11% | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.04%. | 
| 3 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
| Web |  | 
| Vanguard.com | For the most complete source of Vanguard news   For fund, account, and service information   For most account transactions   For literature requests   24 hours a day, 7 days a week | 
| Phone | |
| Investor Information 800-662-7447 (Text telephone for people with  hearing impairment at 800-749-7273) | For fund and service information For literature requests | 
| Client Services 800-662-2739 (Text telephone for people with  hearing impairment at 800-749-7273) | For account information For most account transactions | 
| Participant Services 800-523-1188 (Text telephone for people with  hearing impairment at 800-749-7273) | For information and services for participants in  employer-sponsored plans | 
| Institutional Division 888-809-8102 | For information and services for large institutional  investors | 
| Financial Advisor and Intermediary Sales Support 800-997-2798 | For information and services for financial intermediaries  including financial advisors, broker-dealers, trust  institutions, and insurance companies | 
| Financial Advisory and Intermediary  Trading Support 800-669-0498 | For account information and trading support for  financial intermediaries including financial advisors,  broker-dealers, trust institutions, and insurance  companies | 
| Vanguard Funds | Inception Date | Newspaper Abbreviation | Vanguard Fund Number | CUSIP Number | 
| Vanguard Total Stock Market Index Fund | ||||
| Institutional Shares | 7/7/1997 | TotStInst | 855 | 922908801 | 
| Institutional Plus  Shares | 4/28/2015 | TTLstkMKTinstpls | 1871 | 922908355 | 
| Vanguard Large-Cap Index Fund | ||||
| Institutional Shares | 6/30/2005 (Investor Shares 1/30/2004) | LaCapInt | 807 | 922908561 | 
| Vanguard Value Index Fund | ||||
| Institutional Shares | 7/2/1998 (Investor Shares 11/2/1992) | ValueInst | 867 | 922908850 | 
| Vanguard Growth  Index Fund |  |  |  |  | 
| Institutional Shares | 5/14/1998 (Investor Shares 11/2/1992) | GrwthInst | 868 | 922908868 | 
 
  
 |  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Extended Market Index Fund Investor Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| Standard & Poor’s Completion Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Mid-Cap Index Fund Investor Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Mid Cap Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Mid-Cap Value Index Fund Investor Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Mid Cap Value Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Mid-Cap Growth Index Fund Investor Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Mid Cap Growth Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
 symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether a Fund is the right investment for you. We suggest that you keep this prospectus for future reference.
  symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether a Fund is the right investment for you. We suggest that you keep this prospectus for future reference.| Plain Talk About Costs of Investing | 
| Costs are an important consideration in choosing a mutual fund. That is  because you, as a shareholder, pay a proportionate share of the costs of  operating a fund and any transaction costs incurred when the fund buys or  sells securities, including costs generated by shareholders of other share  classes offered by the fund. These costs can erode a substantial portion of  the gross income or the capital appreciation a fund achieves. Even  seemingly small differences in expenses can, over time, have a dramatic  effect on a fund’s performance. | 
 
 | Vanguard Fund | Asset-Weighted Median Market Capitalization | 
| Vanguard Extended Market Index Fund | $6.7 billion | 
| Vanguard Mid-Cap Index Fund | 28.1 billion | 
| Vanguard Mid-Cap Value Index Fund | 25.4 billion | 
| Vanguard Mid-Cap Growth Index Fund | 31.3 billion   | 
 
 | Plain Talk About Growth Funds and Value Funds | 
| Growth investing and value investing are two styles employed by stock-fund  managers. Growth funds generally invest in stocks of companies believed to  have above-average potential for growth in revenue, earnings, cash flow, or  other similar criteria. These stocks typically have low dividend yields, if any,  and above-average prices in relation to measures such as earnings and book  value. Value funds typically invest in stocks whose prices are below average  in relation to those measures; these stocks often have above-average  dividend yields. Value stocks also may remain undervalued by the market for  long periods of time. Growth and value stocks have historically produced  similar long-term returns, though each category has periods when it  outperforms the other. | 
 
  
 | Plain Talk About Vanguard’s Unique Corporate Structure | 
| Vanguard is owned jointly by the funds it oversees and thus indirectly by the  shareholders in those funds. Most other mutual funds are operated by  management companies that are owned by third parties—either public or  private stockholders—and not by the funds they serve.   | 
| Plain Talk About Distributions | 
| As a shareholder, you are entitled to your portion of a fund’s income from  interest as well as capital gains from the fund’s sale of investments. Income  consists of interest the fund earns from its money market and bond  investments. Income consists of both the dividends that the fund earns from  any stock holdings and the interest it receives from any money market and  bond investments. Capital gains are realized whenever the fund sells  securities for higher prices than it paid for them. These capital gains are  either short-term or long-term, depending on whether the fund held the  securities for one year or less or for more than one year. | 
| Plain Talk About Buying a Dividend | 
| Unless you are a tax-exempt investor or investing through a tax-advantaged  account (such as an IRA or an employer-sponsored retirement or savings  plan), you should consider avoiding a purchase of fund shares shortly before  the fund makes a distribution, because doing so can cost you money in  taxes. This is known as “buying a dividend.” For example: On December 15,  you invest $5,000, buying 250 shares for $20 each. If the fund pays a  distribution of $1 per share on December 16, its share price will drop to $19  (not counting market change). You still have only $5,000 (250 shares x $19 =  $4,750 in share value, plus 250 shares x $1 = $250 in distributions), but you  owe tax on the $250 distribution you received—even if you reinvest it in more  shares. To avoid buying a dividend, check a fund’s distribution schedule  before you invest.   | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $100.93 | $138.80 | $124.83 | $95.66 | $75.74 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 1.411 | 1.280 | 1.216 | .983 | .962 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 23.876 | (38.141) | 14.134 | 29.401 | 20.089 | 
| Total from Investment Operations | 25.287 | (36.861) | 15.350 | 30.384 | 21.051 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (1.437) | (1.009) | (1.380) | (1.214) | (1.131) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (1.437) | (1.009) | (1.380) | (1.214) | (1.131) | 
| Net Asset Value, End of Period | $124.78 | $100.93 | $138.80 | $124.83 | $95.66 | 
| Total Return2 | 25.22% | -26.56% | 12.31% | 32.04% | 27.87% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $232 | $229 | $399 | $454 | $455 | 
| Ratio of Total Expenses to Average Net Assets | 0.19%3 | 0.19%3 | 0.19% | 0.19% | 0.19% | 
| Ratio of Net Investment Income to Average Net Assets | 1.28% | 1.14% | 0.87% | 1.04% | 1.09% | 
| Portfolio Turnover Rate4 | 11% | 11% | 19% | 19% | 13% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.19%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $55.66 | $69.54 | $56.52 | $48.64 | $37.71 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | .887 | .807 | .652 | .698 | .577 | 
| Net Realized and Unrealized Gain (Loss) on Investments | 7.851 | (13.875) | 13.065 | 7.937 | 11.018 | 
| Total from Investment Operations | 8.738 | (13.068) | 13.717 | 8.635 | 11.595 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (.888) | (.812) | (.697) | (.755) | (.665) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (.888) | (.812) | (.697) | (.755) | (.665) | 
| Net Asset Value, End of Period | $63.51 | $55.66 | $69.54 | $56.52 | $48.64 | 
| Total Return2 | 15.84% | -18.80% | 24.36% | 18.10% | 30.86% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $416 | $476 | $740 | $834 | $877 | 
| Ratio of Total Expenses to Average Net Assets | 0.17%3 | 0.17%3 | 0.17% | 0.17% | 0.17% | 
| Ratio of Net Investment Income to Average Net Assets | 1.52% | 1.36% | 1.02% | 1.49% | 1.31% | 
| Portfolio Turnover Rate4 | 13% | 12% | 16% | 26% | 15% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.17%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $53.27 | $59.16 | $46.83 | $46.96 | $37.50 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 1.202 | 1.129 | 1.006 | 1.0482 | .808 | 
| Net Realized and Unrealized Gain (Loss) on Investments | 3.830 | (5.876) | 12.311 | (.122) | 9.566 | 
| Total from Investment Operations | 5.032 | (4.747) | 13.317 | .926 | 10.374 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (1.232) | (1.143) | (.987) | (1.056) | (.914) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (1.232) | (1.143) | (.987) | (1.056) | (.914) | 
| Net Asset Value, End of Period | $57.07 | $53.27 | $59.16 | $46.83 | $46.96 | 
| Total Return3 | 9.62% | -8.00% | 28.59% | 2.43% | 27.82% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $39 | $45 | $57 | $43 | $52 | 
| Ratio of Total Expenses to Average Net Assets | 0.19%4 | 0.19%4 | 0.19% | 0.19% | 0.19% | 
| Ratio of Net Investment Income to Average Net Assets | 2.24% | 2.05% | 1.83% | 2.58%2 | 1.90% | 
| Portfolio Turnover Rate5 | 22% | 18% | 17% | 39% | 17% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Net investment income per share and the ratio of net investment income to average net  assets include $.142 and 0.35%, respectively, resulting from a special dividend from  NortonLifeLock Inc. in February 2020. | 
| 3 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 4 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.19%. | 
| 5 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $70.68 | $100.07 | $83.37 | $62.43 | $47.02 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | .528 | .444 | .229 | .340 | .345 | 
| Net Realized and Unrealized Gain (Loss) on Investments | 15.674 | (29.381) | 16.697 | 20.984 | 15.485 | 
| Total from Investment Operations | 16.202 | (28.937) | 16.926 | 21.324 | 15.830 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (.522) | (.453) | (.226) | (.384) | (.420) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (.522) | (.453) | (.226) | (.384) | (.420) | 
| Net Asset Value, End of Period | $86.36 | $70.68 | $100.07 | $83.37 | $62.43 | 
| Total Return2 | 22.99% | -28.93% | 20.32% | 34.32% | 33.72% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $49 | $46 | $86 | $81 | $63 | 
| Ratio of Total Expenses to Average Net Assets | 0.19% | 0.19%3 | 0.19% | 0.19% | 0.19% | 
| Ratio of Net Investment Income to Average Net Assets | 0.68% | 0.57% | 0.25% | 0.51% | 0.62% | 
| Portfolio Turnover Rate4 | 14% | 22% | 25% | 22% | 18% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.19%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
| Web |  | 
| Vanguard.com | For the most complete source of Vanguard news   For fund, account, and service information   For most account transactions   For literature requests   24 hours a day, 7 days a week | 
| Phone | |
| Investor Information 800-662-7447 (Text telephone for people with  hearing impairment at 800-749-7273) | For fund and service information For literature requests | 
| Client Services 800-662-2739 (Text telephone for people with  hearing impairment at 800-749-7273) | For account information For most account transactions | 
| Participant Services 800-523-1188 (Text telephone for people with  hearing impairment at 800-749-7273) | For information and services for participants in  employer-sponsored plans | 
| Institutional Division 888-809-8102 | For information and services for large institutional  investors | 
| Financial Advisor and Intermediary Sales Support 800-997-2798 | For information and services for financial intermediaries  including financial advisors, broker-dealers, trust  institutions, and insurance companies | 
| Financial Advisory and Intermediary  Trading Support 800-669-0498 | For account information and trading support for  financial intermediaries including financial advisors,  broker-dealers, trust institutions, and insurance  companies | 
| Vanguard Fund | Inception Date | Newspaper Abbreviation | Vanguard Fund Number | CUSIP Number | 
| Vanguard Extended Market Index Fund | ||||
| Investor Shares | 12/21/1987 | Extnd | 98 | 922908207 | 
| Vanguard Mid-Cap Index Fund | ||||
| Investor Shares | 5/21/1998 | MidCp | 859 | 922908843 | 
| Vanguard Mid-Cap Value Index Fund | ||||
| Investor Shares | 8/24/2006 | MdCpVlIn | 835 | 922908520 | 
| Vanguard Mid-Cap Growth Index Fund | ||||
| Investor Shares | 8/24/2006 | MdCpGrln | 832 | 922908546 | 
 
  
 |  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Extended Market Index Fund Admiral Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| Standard & Poor’s Completion Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Mid-Cap Index Fund Admiral Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Mid Cap Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Mid-Cap Value Index Fund Admiral Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Mid Cap Value Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Mid-Cap Growth Index Fund Admiral Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Mid Cap Growth Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
 symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether a Fund is the right investment for you. We suggest that you keep this prospectus for future reference.
  symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether a Fund is the right investment for you. We suggest that you keep this prospectus for future reference.| Plain Talk About Costs of Investing | 
| Costs are an important consideration in choosing a mutual fund. That is  because you, as a shareholder, pay a proportionate share of the costs of  operating a fund and any transaction costs incurred when the fund buys or  sells securities, including costs generated by shareholders of other share  classes offered by the fund. These costs can erode a substantial portion of  the gross income or the capital appreciation a fund achieves. Even  seemingly small differences in expenses can, over time, have a dramatic  effect on a fund’s performance.   | 
 
 | Vanguard Fund | Asset-Weighted Median Market Capitalization | 
| Vanguard Extended Market Index Fund | $6.7 billion | 
| Vanguard Mid-Cap Index Fund | 28.1 billion | 
| Vanguard Mid-Cap Value Index Fund | 25.4 billion | 
| Vanguard Mid-Cap Growth Index Fund | 31.3 billion   | 
 
 | Plain Talk About Growth Funds and Value Funds | 
| Growth investing and value investing are two styles employed by stock-fund  managers. Growth funds generally invest in stocks of companies believed to  have above-average potential for growth in revenue, earnings, cash flow, or  other similar criteria. These stocks typically have low dividend yields, if any,  and above-average prices in relation to measures such as earnings and book  value. Value funds typically invest in stocks whose prices are below average  in relation to those measures; these stocks often have above-average  dividend yields. Value stocks also may remain undervalued by the market for  long periods of time. Growth and value stocks have historically produced  similar long-term returns, though each category has periods when it  outperforms the other. | 
 
  
 | Plain Talk About Vanguard’s Unique Corporate Structure | 
| Vanguard is owned jointly by the funds it oversees and thus indirectly by the  shareholders in those funds. Most other mutual funds are operated by  management companies that are owned by third parties—either public or  private stockholders—and not by the funds they serve.   | 
| Plain Talk About Distributions | 
| As a shareholder, you are entitled to your portion of a fund’s income from  interest as well as capital gains from the fund’s sale of investments. Income  consists of interest the fund earns from its money market and bond  investments. Income consists of both the dividends that the fund earns from  any stock holdings and the interest it receives from any money market and  bond investments. Capital gains are realized whenever the fund sells  securities for higher prices than it paid for them. These capital gains are  either short-term or long-term, depending on whether the fund held the  securities for one year or less or for more than one year. | 
| Plain Talk About Buying a Dividend | 
| Unless you are a tax-exempt investor or investing through a tax-advantaged  account (such as an IRA or an employer-sponsored retirement or savings  plan), you should consider avoiding a purchase of fund shares shortly before  the fund makes a distribution, because doing so can cost you money in  taxes. This is known as “buying a dividend.” For example: On December 15,  you invest $5,000, buying 250 shares for $20 each. If the fund pays a  distribution of $1 per share on December 16, its share price will drop to $19  (not counting market change). You still have only $5,000 (250 shares x $19 =  $4,750 in share value, plus 250 shares x $1 = $250 in distributions), but you  owe tax on the $250 distribution you received—even if you reinvest it in more  shares. To avoid buying a dividend, check a fund’s distribution schedule  before you invest.   | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $100.85 | $138.70 | $124.75 | $95.61 | $75.70 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 1.557 | 1.437 | 1.408 | 1.112 | 1.236 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 23.851 | (38.129) | 14.106 | 29.367 | 19.918 | 
| Total from Investment Operations | 25.408 | (36.692) | 15.514 | 30.479 | 21.154 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (1.578) | (1.158) | (1.564) | (1.339) | (1.244) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (1.578) | (1.158) | (1.564) | (1.339) | (1.244) | 
| Net Asset Value, End of Period | $124.68 | $100.85 | $138.70 | $124.75 | $95.61 | 
| Total Return2 | 25.38% | -26.47% | 12.45% | 32.21% | 28.03% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $23,639 | $20,012 | $29,054 | $26,784 | $22,391 | 
| Ratio of Total Expenses to Average Net Assets | 0.06%3 | 0.06%3 | 0.06% | 0.06% | 0.06% | 
| Ratio of Net Investment Income to Average Net Assets | 1.42% | 1.29% | 1.01% | 1.18% | 1.39% | 
| Portfolio Turnover Rate4 | 11% | 11% | 19% | 19% | 13% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.06%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $252.47 | $315.46 | $256.40 | $220.66 | $171.04 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 4.381 | 4.028 | 3.333 | 3.418 | 3.296 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 35.571 | (63.000) | 59.242 | 36.010 | 49.578 | 
| Total from Investment Operations | 39.952 | (58.972) | 62.575 | 39.428 | 52.874 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (4.352) | (4.018) | (3.515) | (3.688) | (3.254) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (4.352) | (4.018) | (3.515) | (3.688) | (3.254) | 
| Net Asset Value, End of Period | $288.07 | $252.47 | $315.46 | $256.40 | $220.66 | 
| Total Return2 | 15.98% | -18.71% | 24.51% | 18.24% | 31.03% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $57,330 | $51,352 | $65,118 | $53,301 | $47,640 | 
| Ratio of Total Expenses to Average Net Assets | 0.05%3 | 0.05%3 | 0.05% | 0.05% | 0.05% | 
| Ratio of Net Investment Income to Average Net  Assets | 1.65% | 1.51% | 1.14% | 1.61% | 1.62% | 
| Portfolio Turnover Rate4 | 13% | 12% | 16% | 26% | 15% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.05%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $70.08 | $77.84 | $61.61 | $61.79 | $49.33 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 1.677 | 1.586 | 1.413 | 1.4382 | 1.303 | 
| Net Realized and Unrealized Gain (Loss) on Investments | 5.030 | (7.753) | 16.201 | (.162) | 12.422 | 
| Total from Investment Operations | 6.707 | (6.167) | 17.614 | 1.276 | 13.725 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (1.707) | (1.593) | (1.384) | (1.456) | (1.265) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (1.707) | (1.593) | (1.384) | (1.456) | (1.265) | 
| Net Asset Value, End of Period | $75.08 | $70.08 | $77.84 | $61.61 | $61.79 | 
| Total Return3 | 9.76% | -7.90% | 28.76% | 2.54% | 27.99% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $11,972 | $11,740 | $13,218 | $10,092 | $11,148 | 
| Ratio of Total Expenses to Average Net Assets | 0.07%4 | 0.07%4 | 0.07% | 0.07% | 0.07% | 
| Ratio of Net Investment Income to Average Net Assets | 2.37% | 2.19% | 1.95% | 2.69%2 | 2.28% | 
| Portfolio Turnover Rate5 | 22% | 18% | 17% | 39% | 17% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Net investment income per share and the ratio of net investment income to average net  assets include $.187 and 0.35%, respectively, resulting from a special dividend from  NortonLifeLock Inc. in February 2020. | 
| 3 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 4 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.07%. | 
| 5 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $77.37 | $109.55 | $91.26 | $68.34 | $51.48 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | .684 | .602 | .373 | .461 | .603 | 
| Net Realized and Unrealized Gain (Loss) on Investments | 17.150 | (32.180) | 18.287 | 22.967 | 16.793 | 
| Total from Investment Operations | 17.834 | (31.578) | 18.660 | 23.428 | 17.396 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (.674) | (.602) | (.370) | (.508) | (.536) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (.674) | (.602) | (.370) | (.508) | (.536) | 
| Net Asset Value, End of Period | $94.53 | $77.37 | $109.55 | $91.26 | $68.34 | 
| Total Return2 | 23.14% | -28.84% | 20.48% | 34.48% | 33.86% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $11,104 | $9,124 | $12,797 | $10,712 | $8,173 | 
| Ratio of Total Expenses to Average Net Assets | 0.07% | 0.07%3 | 0.07% | 0.07% | 0.07% | 
| Ratio of Net Investment Income to Average Net Assets | 0.81% | 0.71% | 0.37% | 0.63% | 0.96% | 
| Portfolio Turnover Rate4 | 14% | 22% | 25% | 22% | 18% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.07%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
| Web |  | 
| Vanguard.com | For the most complete source of Vanguard news   For fund, account, and service information   For most account transactions   For literature requests   24 hours a day, 7 days a week | 
| Phone | |
| Investor Information 800-662-7447 (Text telephone for people with  hearing impairment at 800-749-7273) | For fund and service information For literature requests | 
| Client Services 800-662-2739 (Text telephone for people with  hearing impairment at 800-749-7273) | For account information For most account transactions | 
| Participant Services 800-523-1188 (Text telephone for people with  hearing impairment at 800-749-7273) | For information and services for participants in  employer-sponsored plans | 
| Institutional Division 888-809-8102 | For information and services for large institutional  investors | 
| Financial Advisor and Intermediary Sales Support 800-997-2798 | For information and services for financial intermediaries  including financial advisors, broker-dealers, trust  institutions, and insurance companies | 
| Financial Advisory and Intermediary  Trading Support 800-669-0498 | For account information and trading support for  financial intermediaries including financial advisors,  broker-dealers, trust institutions, and insurance  companies | 
| Vanguard Fund | Inception Date | Newspaper Abbreviation | Vanguard Fund Number | CUSIP Number | 
| Vanguard Extended Market Index Fund | ||||
| Admiral Shares | 11/13/2000 | ExtndAdml | 598 | 922908694 | 
| Vanguard Mid-Cap Index Fund | ||||
| Admiral Shares | 11/12/2001 | MidCpAdml | 5859 | 922908645 | 
| Vanguard Mid-Cap Value Index Fund | ||||
| Admiral Shares | 9/27/2011 | MdCpVIAdml | 5835 | 921937694 | 
| Vanguard Mid-Cap Growth Index Fund | ||||
| Admiral Shares | 9/27/2011 | MdCpGrAdml | 5832 | 921937728 | 
 
  
 |  | Institutional Shares | Institutional Plus Shares | 
| Sales Charge (Load) Imposed on Purchases |  |  | 
| Purchase Fee |  |  | 
| Sales Charge (Load) Imposed on Reinvested  Dividends |  |  | 
| Redemption Fee |  |  | 
|  | Institutional Shares | Institutional Plus Shares | 
| Management Fees | % |  | 
| 12b-1 Distribution Fee |  |  | 
| Other Expenses | % |  | 
| Total Annual Fund Operating Expenses | % |  | 
|  | 1 Year | 3 Years | 5 Years | 10 Years | 
| Institutional Shares | $ | $ | $ | $ | 
| Institutional Plus Shares | $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Extended Market Index Fund  Institutional Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| Vanguard Extended Market Index Fund Institutional  Plus Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Standard & Poor’s Completion Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | Institutional Shares | Institutional Plus Shares | 
| Sales Charge (Load) Imposed on Purchases |  |  | 
| Purchase Fee |  |  | 
| Sales Charge (Load) Imposed on Reinvested  Dividends |  |  | 
| Redemption Fee |  |  | 
|  | Institutional Shares | Institutional Plus Shares | 
| Management Fees | % |  | 
| 12b-1 Distribution Fee |  |  | 
| Other Expenses | % |  | 
| Total Annual Fund Operating Expenses | % |  | 
|  | 1 Year | 3 Years | 5 Years | 10 Years | 
| Institutional Shares | $ | $ | $ | $ | 
| Institutional Plus Shares | $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Mid-Cap Index Fund Institutional Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| Vanguard Mid-Cap Index Fund Institutional Plus Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| CRSP US Mid Cap Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
 symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether a Fund is the right investment for you. We suggest that you keep this prospectus for future reference.
  symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether a Fund is the right investment for you. We suggest that you keep this prospectus for future reference.| Plain Talk About Costs of Investing | 
| Costs are an important consideration in choosing a mutual fund. That is  because you, as a shareholder, pay a proportionate share of the costs of  operating a fund and any transaction costs incurred when the fund buys or  sells securities, including costs generated by shareholders of other share  classes offered by the fund. These costs can erode a substantial portion of  the gross income or the capital appreciation a fund achieves. Even  seemingly small differences in expenses can, over time, have a dramatic  effect on a fund’s performance.   | 
 
 | Vanguard Fund | Asset-Weighted Median Market Capitalization | 
| Vanguard Extended Market Index Fund | $6.7 billion | 
| Vanguard Mid-Cap Index Fund | 28.1 billion | 
 
  
  
 | Plain Talk About Vanguard’s Unique Corporate Structure | 
| Vanguard is owned jointly by the funds it oversees and thus indirectly by the  shareholders in those funds. Most other mutual funds are operated by  management companies that are owned by third parties—either public or  private stockholders—and not by the funds they serve. | 
| Plain Talk About Distributions | 
| As a shareholder, you are entitled to your portion of a fund’s income from  interest as well as capital gains from the fund’s sale of investments. Income  consists of interest the fund earns from its money market and bond  investments. Income consists of both the dividends that the fund earns from  any stock holdings and the interest it receives from any money market and  bond investments. Capital gains are realized whenever the fund sells  securities for higher prices than it paid for them. These capital gains are  either short-term or long-term, depending on whether the fund held the  securities for one year or less or for more than one year. | 
| Plain Talk About Buying a Dividend | 
| Unless you are a tax-exempt investor or investing through a tax-advantaged  account (such as an IRA or an employer-sponsored retirement or savings  plan), you should consider avoiding a purchase of fund shares shortly before  the fund makes a distribution, because doing so can cost you money in  taxes. This is known as “buying a dividend.” For example: On December 15,  you invest $5,000, buying 250 shares for $20 each. If the fund pays a  distribution of $1 per share on December 16, its share price will drop to $19  (not counting market change). You still have only $5,000 (250 shares x $19 =  $4,750 in share value, plus 250 shares x $1 = $250 in distributions), but you  owe tax on the $250 distribution you received—even if you reinvest it in more  shares. To avoid buying a dividend, check a fund’s distribution schedule  before you invest. | 
|  |  |  |  |  |  | 
| For a Share Outstanding Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $100.84 | $138.69 | $124.74 | $95.60 | $75.69 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 1.567 | 1.439 | 1.413 | 1.125 | 1.239 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 23.862 | (38.120) | 14.115 | 29.364 | 19.925 | 
| Total from Investment Operations | 25.429 | (36.681) | 15.528 | 30.489 | 21.164 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (1.589) | (1.169) | (1.578) | (1.349) | (1.254) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (1.589) | (1.169) | (1.578) | (1.349) | (1.254) | 
| Net Asset Value, End of Period | $124.68 | $100.84 | $138.69 | $124.74 | $95.60 | 
| Total Return | 25.41% | -26.46% | 12.47% | 32.23% | 28.05% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $15,139 | $12,983 | $19,456 | $18,659 | $14,927 | 
| Ratio of Total Expenses to Average Net Assets | 0.05%2 | 0.05%2 | 0.05% | 0.05% | 0.05% | 
| Ratio of Net Investment Income to Average Net Assets | 1.43% | 1.29% | 1.01% | 1.19% | 1.40% | 
| Portfolio Turnover Rate3 | 11% | 11% | 19% | 19% | 13% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.05%. | 
| 3 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $248.85 | $342.27 | $307.85 | $235.94 | $186.80 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 3.898 | 3.597 | 3.595 | 2.798 | 3.078 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 58.870 | (94.104) | 34.757 | 72.466 | 49.178 | 
| Total from Investment Operations | 62.768 | (90.507) | 38.352 | 75.264 | 52.256 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (3.948) | (2.913) | (3.932) | (3.354) | (3.116) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (3.948) | (2.913) | (3.932) | (3.354) | (3.116) | 
| Net Asset Value, End of Period | $307.67 | $248.85 | $342.27 | $307.85 | $235.94 | 
| Total Return | 25.41% | -26.45% | 12.48% | 32.24% | 28.07% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $12,216 | $10,446 | $15,973 | $11,665 | $9,486 | 
| Ratio of Total Expenses to Average Net Assets | 0.04%2 | 0.04%2 | 0.04% | 0.04% | 0.04% | 
| Ratio of Net Investment Income to Average Net  Assets | 1.44% | 1.31% | 1.04% | 1.20% | 1.41% | 
| Portfolio Turnover Rate3 | 11% | 11% | 19% | 19% | 13% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.04%. | 
| 3 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $55.77 | $69.69 | $56.64 | $48.74 | $37.78 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | .971 | .893 | .743 | .759 | .727 | 
| Net Realized and Unrealized Gain (Loss) on Investments | 7.866 | (13.919) | 13.090 | 7.961 | 10.957 | 
| Total from Investment Operations | 8.837 | (13.026) | 13.833 | 8.720 | 11.684 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (.967) | (.894) | (.783) | (.820) | (.724) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (.967) | (.894) | (.783) | (.820) | (.724) | 
| Net Asset Value, End of Period | $63.64 | $55.77 | $69.69 | $56.64 | $48.74 | 
| Total Return | 16.00% | -18.70% | 24.53% | 18.26% | 31.04% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $21,867 | $20,231 | $27,312 | $22,291 | $20,425 | 
| Ratio of Total Expenses to Average Net Assets | 0.04%2 | 0.04%2 | 0.04% | 0.04% | 0.04% | 
| Ratio of Net Investment Income to Average Net Assets | 1.66% | 1.51% | 1.15% | 1.62% | 1.62% | 
| Portfolio Turnover Rate3 | 13% | 12% | 16% | 26% | 15% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.04%. | 
| 3 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $275.06 | $343.68 | $279.34 | $240.40 | $186.34 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 4.831 | 4.458 | 3.688 | 3.774 | 3.598 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 38.747 | (68.641) | 64.544 | 39.230 | 54.052 | 
| Total from Investment Operations | 43.578 | (64.183) | 68.232 | 43.004 | 57.650 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (4.798) | (4.437) | (3.892) | (4.064) | (3.590) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (4.798) | (4.437) | (3.892) | (4.064) | (3.590) | 
| Net Asset Value, End of Period | $313.84 | $275.06 | $343.68 | $279.34 | $240.40 | 
| Total Return | 16.00% | -18.69% | 24.53% | 18.27% | 31.06% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $16,472 | $14,846 | $17,723 | $14,937 | $13,612 | 
| Ratio of Total Expenses to Average Net Assets | 0.03%2 | 0.03%2 | 0.03% | 0.03% | 0.03% | 
| Ratio of Net Investment Income to Average Net  Assets | 1.67% | 1.53% | 1.16% | 1.63% | 1.62% | 
| Portfolio Turnover Rate3 | 13% | 12% | 16% | 26% | 15% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.03%. | 
| 3 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
| Web |  | 
| Vanguard.com | For the most complete source of Vanguard news   For fund, account, and service information   For most account transactions   For literature requests   24 hours a day, 7 days a week | 
| Phone | |
| Investor Information 800-662-7447 (Text telephone for people with  hearing impairment at 800-749-7273) | For fund and service information For literature requests | 
| Client Services 800-662-2739 (Text telephone for people with  hearing impairment at 800-749-7273) | For account information For most account transactions | 
| Participant Services 800-523-1188 (Text telephone for people with  hearing impairment at 800-749-7273) | For information and services for participants in  employer-sponsored plans | 
| Institutional Division 888-809-8102 | For information and services for large institutional  investors | 
| Financial Advisor and Intermediary Sales Support 800-997-2798 | For information and services for financial intermediaries  including financial advisors, broker-dealers, trust  institutions, and insurance companies | 
| Financial Advisory and Intermediary  Trading Support 800-669-0498 | For account information and trading support for  financial intermediaries including financial advisors,  broker-dealers, trust institutions, and insurance  companies | 
| Vanguard Fund | Inception Date | Newspaper Abbreviation | Vanguard Fund Number | CUSIP Number | 
| Vanguard Extended Market Index Fund | ||||
| Institutional Shares | 7/7/1997 | ExtndInst | 856 | 922908884 | 
| Institutional Plus Shares | 1/14/2011 | ExtndIstPl | 1860 | 922908371 | 
| Vanguard Mid-Cap Index Fund | ||||
| Institutional Shares | 5/21/1998 | MidCpInst | 864 | 922908835 | 
| Institutional Plus Shares | 12/15/2010 | MidCpIstPl | 1859 | 922908389 | 
 
  
 |  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Small-Cap Index Fund Investor Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Small Cap Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Small-Cap Value Index Fund Investor Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Small Cap Value Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Small-Cap Growth Index Fund Investor Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Small Cap Growth Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
 symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether a Fund is the right investment for you. We suggest that you keep this prospectus for future reference.
  symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether a Fund is the right investment for you. We suggest that you keep this prospectus for future reference.| Plain Talk About Costs of Investing | 
| Costs are an important consideration in choosing a mutual fund. That is  because you, as a shareholder, pay a proportionate share of the costs of  operating a fund and any transaction costs incurred when the fund buys or  sells securities, including costs generated by shareholders of other share  classes offered by the fund. These costs can erode a substantial portion of  the gross income or the capital appreciation a fund achieves. Even  seemingly small differences in expenses can, over time, have a dramatic  effect on a fund’s performance. | 
 
 | Vanguard Fund | Asset-Weighted Median Market Capitalization | 
| Vanguard Small-Cap Index Fund | $6.7 billion | 
| Vanguard Small-Cap Value Index Fund | 6.4 billion | 
| Vanguard Small-Cap Growth Index Fund | 7.2 billion | 
 
 | Plain Talk About Growth Funds and Value Funds | 
| Growth investing and value investing are two styles employed by stock-fund  managers. Growth funds generally invest in stocks of companies believed to  have above-average potential for growth in revenue, earnings, cash flow, or  other similar criteria. These stocks typically have low dividend yields, if any,  and above-average prices in relation to measures such as earnings and book  value. Value funds typically invest in stocks whose prices are below average  in relation to those measures; these stocks often have above-average  dividend yields. Value stocks also may remain undervalued by the market for  long periods of time. Growth and value stocks have historically produced  similar long-term returns, though each category has periods when it  outperforms the other. | 
 
 | Plain Talk About Vanguard’s Unique Corporate Structure | 
| Vanguard is owned jointly by the funds it oversees and thus indirectly by the  shareholders in those funds. Most other mutual funds are operated by  management companies that are owned by third parties—either public or  private stockholders—and not by the funds they serve. | 
| Plain Talk About Distributions | 
| As a shareholder, you are entitled to your portion of a fund’s income from  interest and dividends, as well as capital gains from the fund’s sale of  investments. Income consists of both the dividends that the fund earns from  any stock holdings and the interest it receives from any for higher prices than  it paid for them. These capital gains are either short-term or long-term,  depending on whether the fund held the securities for one year or less or for  more than one year. | 
| Plain Talk About Buying a Dividend | 
| Unless you are a tax-exempt investor or investing through a tax-advantaged  account (such as an IRA or an employer-sponsored retirement or saving  plan), you should consider avoiding a purchase of fund shares shortly before  the fund makes a distribution, because doing so can cost you money in  taxes. This is known as “buying a dividend.” For example: On December 15,  you invest $5,000, buying 250 shares for $20 each. If the fund pays a  distribution of $1 per share on December 16, its share price will drop to $19  (not counting market change). You still have only $5,000 (250 shares x $19 =  $4,750 in share value, plus 250 shares x $1 = $250 in distributions), but you  owe tax on the $250 distribution you received—even if you reinvest it in more  shares. To avoid buying a dividend, check a fund’s distribution schedule  before you invest. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $87.93 | $108.35 | $93.20 | $79.35 | $63.21 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 1.412 | 1.256 | 1.230 | .928 | .832 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 14.314 | (20.439) | 15.130 | 13.897 | 16.319 | 
| Total from Investment Operations | 15.726 | (19.183) | 16.360 | 14.825 | 17.151 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (1.476) | (1.237) | (1.210) | (.975) | (1.011) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (1.476) | (1.237) | (1.210) | (.975) | (1.011) | 
| Net Asset Value, End of Period | $102.18 | $87.93 | $108.35 | $93.20 | $79.35 | 
| Total Return2 | 18.05% | -17.71% | 17.59% | 18.96% | 27.22% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $375 | $424 | $619 | $709 | $754 | 
| Ratio of Total Expenses to Average Net Assets | 0.17% | 0.17%3 | 0.17% | 0.17% | 0.17% | 
| Ratio of Net Investment Income to Average Net Assets | 1.52% | 1.34% | 1.17% | 1.26% | 1.14% | 
| Portfolio Turnover Rate4 | 12% | 14% | 17% | 22% | 16% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.17%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $38.09 | $42.87 | $34.08 | $32.86 | $27.35 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | .855 | .722 | .724 | .550 | .543 | 
| Net Realized and Unrealized Gain (Loss) on Investments | 5.089 | (4.777) | 8.767 | 1.208 | 5.608 | 
| Total from Investment Operations | 5.944 | (4.055) | 9.491 | 1.758 | 6.151 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (.864) | (.725) | (.701) | (.538) | (.641) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (.864) | (.725) | (.701) | (.538) | (.641) | 
| Net Asset Value, End of Period | $43.17 | $38.09 | $42.87 | $34.08 | $32.86 | 
| Total Return2 | 15.86% | -9.43% | 27.96% | 5.72% | 22.61% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $112 | $149 | $208 | $234 | $255 | 
| Ratio of Total Expenses to Average Net Assets | 0.19%3 | 0.19%3 | 0.19% | 0.19% | 0.19% | 
| Ratio of Net Investment Income to Average Net Assets | 2.18% | 1.83% | 1.78% | 1.98% | 1.76% | 
| Portfolio Turnover Rate4 | 16% | 13% | 16% | 26% | 19% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.19%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $56.38 | $79.21 | $75.20 | $55.89 | $42.36 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | .326 | .371 | .257 | .241 | .178 | 
| Net Realized and Unrealized Gain (Loss) on Investments | 11.639 | (22.943) | 3.938 | 19.331 | 13.617 | 
| Total from Investment Operations | 11.965 | (22.572) | 4.195 | 19.572 | 13.795 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (.385) | (.258) | (.185) | (.262) | (.265) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (.385) | (.258) | (.185) | (.262) | (.265) | 
| Net Asset Value, End of Period | $67.96 | $56.38 | $79.21 | $75.20 | $55.89 | 
| Total Return2 | 21.28% | -28.49% | 5.58% | 35.12% | 32.60% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $89 | $80 | $149 | $209 | $171 | 
| Ratio of Total Expenses to Average Net Assets | 0.19% | 0.19%3 | 0.19% | 0.19% | 0.19% | 
| Ratio of Net Investment Income to Average Net Assets | 0.53% | 0.60% | 0.32% | 0.42% | 0.35% | 
| Portfolio Turnover Rate4 | 19% | 24% | 29% | 24% | 18% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.19%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
| Web |  | 
| Vanguard.com | For the most complete source of Vanguard news   For fund, account, and service information   For most account transactions   For literature requests   24 hours a day, 7 days a week | 
| Phone | |
| Investor Information 800-662-7447 (Text telephone for people with  hearing impairment at 800-749-7273) | For fund and service information For literature requests | 
| Client Services 800-662-2739 (Text telephone for people with  hearing impairment at 800-749-7273) | For account information For most account transactions | 
| Participant Services 800-523-1188 (Text telephone for people with  hearing impairment at 800-749-7273) | For information and services for participants in  employer-sponsored plans | 
| Institutional Division 888-809-8102 | For information and services for large institutional  investors | 
| Financial Advisor and Intermediary Sales Support 800-997-2798 | For information and services for financial intermediaries  including financial advisors, broker-dealers, trust  institutions, and insurance companies | 
| Financial Advisory and Intermediary  Trading Support 800-669-0498 | For account information and trading support for  financial intermediaries including financial advisors,  broker-dealers, trust institutions, and insurance  companies | 
| Vanguard Fund | Inception Date | Newspaper Abbreviation | Vanguard Fund Number | CUSIP Number | 
| Vanguard Small-Cap Index Fund | ||||
| Investor Shares | 10/3/1960 | SmCap | 48 | 922908702 | 
| Vanguard Small-Cap Value Index Fund | ||||
| Investor Shares | 5/21/1998 | SmVal | 860 | 922908793 | 
| Vanguard Small-Cap Growth  Index Fund |  |  |  |  | 
| Investor Shares | 5/21/1998 | SmGth | 861 | 922908827 | 
 
  
 |  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Small-Cap Index Fund Admiral Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Small Cap Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Small-Cap Value Index Fund Admiral Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Small Cap Value Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
| Account Service Fee Per Year (for certain fund account balances below $5,000,000) | $ | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Small-Cap Growth Index Fund Admiral Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Small Cap Growth Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
 symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether a Fund is the right investment for you. We suggest that you keep this prospectus for future reference.
  symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether a Fund is the right investment for you. We suggest that you keep this prospectus for future reference.| Plain Talk About Costs of Investing | 
| Costs are an important consideration in choosing a mutual fund. That is  because you, as a shareholder, pay a proportionate share of the costs of  operating a fund and any transaction costs incurred when the fund buys or  sells securities, including costs generated by shareholders of other share  classes offered by the fund. These costs can erode a substantial portion of  the gross income or the capital appreciation a fund achieves. Even  seemingly small differences in expenses can, over time, have a dramatic  effect on a fund’s performance. | 
 
 | Vanguard Fund | Asset-Weighted Median Market Capitalization | 
| Vanguard Small-Cap Index Fund | $6.7 billion | 
| Vanguard Small-Cap Value Index Fund | 6.4 billion | 
| Vanguard Small-Cap Growth Index Fund | 7.2 billion | 
 
 | Plain Talk About Growth Funds and Value Funds | 
| Growth investing and value investing are two styles employed by stock-fund  managers. Growth funds generally invest in stocks of companies believed to  have above-average potential for growth in revenue, earnings, cash flow, or  other similar criteria. These stocks typically have low dividend yields, if any,  and above-average prices in relation to measures such as earnings and book  value. Value funds typically invest in stocks whose prices are below average  in relation to those measures; these stocks often have above-average  dividend yields. Value stocks also may remain undervalued by the market for  long periods of time. Growth and value stocks have historically produced  similar long-term returns, though each category has periods when it  outperforms the other. | 
 
 | Plain Talk About Vanguard’s Unique Corporate Structure | 
| Vanguard is owned jointly by the funds it oversees and thus indirectly by the  shareholders in those funds. Most other mutual funds are operated by  management companies that are owned by third parties—either public or  private stockholders—and not by the funds they serve. | 
| Plain Talk About Distributions | 
| As a shareholder, you are entitled to your portion of a fund’s income from  interest and dividends, as well as capital gains from the fund’s sale of  investments. Income consists of both the dividends that the fund earns from  any stock holdings and the interest it receives from any money market and  bond investments. Capital gains are realized whenever the fund sells  securities for higher prices than it paid for them. These capital gains are  either short-term or long-term, depending on whether the fund held the  securities for one year or less or for more than one year. | 
| Plain Talk About Buying a Dividend | 
| Unless you are a tax-exempt investor or investing through a tax-advantaged  account (such as an IRA or an employer-sponsored retirement or saving  plan), you should consider avoiding a purchase of fund shares shortly before  the fund makes a distribution, because doing so can cost you money in  taxes. This is known as “buying a dividend.” For example: On December 15,  you invest $5,000, buying 250 shares for $20 each. If the fund pays a  distribution of $1 per share on December 16, its share price will drop to $19  (not counting market change). You still have only $5,000 (250 shares x $19 =  $4,750 in share value, plus 250 shares x $1 = $250 in distributions), but you  owe tax on the $250 distribution you received—even if you reinvest it in more  shares. To avoid buying a dividend, check a fund’s distribution schedule  before you invest. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $87.94 | $108.37 | $93.22 | $79.37 | $63.23 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 1.534 | 1.383 | 1.358 | 1.029 | 1.108 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 14.305 | (20.461) | 15.131 | 13.887 | 16.136 | 
| Total from Investment Operations | 15.839 | (19.078) | 16.489 | 14.916 | 17.244 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (1.589) | (1.352) | (1.339) | (1.066) | (1.104) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (1.589) | (1.352) | (1.339) | (1.066) | (1.104) | 
| Net Asset Value, End of Period | $102.19 | $87.94 | $108.37 | $93.22 | $79.37 | 
| Total Return2 | 18.20% | -17.61% | 17.73% | 19.11% | 27.37% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $51,854 | $44,944 | $55,266 | $47,313 | $42,386 | 
| Ratio of Total Expenses to Average Net Assets | 0.05% | 0.05%3 | 0.05% | 0.05% | 0.05% | 
| Ratio of Net Investment Income to Average Net Assets | 1.65% | 1.48% | 1.29% | 1.40% | 1.50% | 
| Portfolio Turnover Rate4 | 12% | 14% | 17% | 22% | 16% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.05%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $68.25 | $76.81 | $61.07 | $58.89 | $49.01 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 1.630 | 1.403 | 1.381 | 1.058 | 1.230 | 
| Net Realized and Unrealized Gain (Loss) on Investments | 9.096 | (8.576) | 15.704 | 2.148 | 9.863 | 
| Total from Investment Operations | 10.726 | (7.173) | 17.085 | 3.206 | 11.093 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (1.636) | (1.387) | (1.345) | (1.026) | (1.213) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (1.636) | (1.387) | (1.345) | (1.026) | (1.213) | 
| Net Asset Value, End of Period | $77.34 | $68.25 | $76.81 | $61.07 | $58.89 | 
| Total Return2 | 15.99% | -9.31% | 28.09% | 5.85% | 22.76% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $19,421 | $17,505 | $19,307 | $14,314 | $13,907 | 
| Ratio of Total Expenses to Average Net Assets | 0.07%3 | 0.07%3 | 0.07% | 0.07% | 0.07% | 
| Ratio of Net Investment Income to Average Net Assets | 2.32% | 1.99% | 1.89% | 2.13% | 2.21% | 
| Portfolio Turnover Rate4 | 16% | 13% | 16% | 26% | 19% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.07%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $70.51 | $99.01 | $94.02 | $69.87 | $52.95 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | .503 | .568 | .448 | .392 | .419 | 
| Net Realized and Unrealized Gain (Loss) on Investments | 14.542 | (28.682) | 4.899 | 24.172 | 16.902 | 
| Total from Investment Operations | 15.045 | (28.114) | 5.347 | 24.564 | 17.321 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (.575) | (.386) | (.357) | (.414) | (.401) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (.575) | (.386) | (.357) | (.414) | (.401) | 
| Net Asset Value, End of Period | $84.98 | $70.51 | $99.01 | $94.02 | $69.87 | 
| Total Return2 | 21.41% | -28.39% | 5.69% | 35.30% | 32.76% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $13,300 | $11,482 | $16,594 | $16,149 | $12,717 | 
| Ratio of Total Expenses to Average Net Assets | 0.07% | 0.07%3 | 0.07% | 0.07% | 0.07% | 
| Ratio of Net Investment Income to Average Net Assets | 0.65% | 0.73% | 0.45% | 0.54% | 0.65% | 
| Portfolio Turnover Rate4 | 19% | 24% | 29% | 24% | 18% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Total returns do not include account service fees that may have applied in the periods shown.  Fund prospectuses provide information about any applicable account service fees. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.07%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
| Web |  | 
| Vanguard.com | For the most complete source of Vanguard news   For fund, account, and service information   For most account transactions   For literature requests   24 hours a day, 7 days a week | 
| Phone | |
| Investor Information 800-662-7447 (Text telephone for people with  hearing impairment at 800-749-7273) | For fund and service information For literature requests | 
| Client Services 800-662-2739 (Text telephone for people with  hearing impairment at 800-749-7273) | For account information For most account transactions | 
| Participant Services 800-523-1188 (Text telephone for people with  hearing impairment at 800-749-7273) | For information and services for participants in  employer-sponsored plans | 
| Institutional Division 888-809-8102 | For information and services for large institutional  investors | 
| Financial Advisor and Intermediary Sales Support 800-997-2798 | For information and services for financial intermediaries  including financial advisors, broker-dealers, trust  institutions, and insurance companies | 
| Financial Advisory and Intermediary  Trading Support 800-669-0498 | For account information and trading support for  financial intermediaries including financial advisors,  broker-dealers, trust institutions, and insurance  companies | 
| Vanguard Fund | Inception Date | Newspaper Abbreviation | Vanguard Fund Number | CUSIP Number | 
| Vanguard Small-Cap Index Fund | ||||
| Admiral Shares | 11/13/2000 | SmCapAdml | 548 | 922908686 | 
| Vanguard Small-Cap Value Index Fund | ||||
| Admiral Shares | 9/27/2011 | SmValAdml | 5860 | 921937686 | 
| Vanguard Small-Cap  Growth Index Fund |  |  |  |  | 
| Admiral Shares | 9/27/2011 | SmGthAdml | 5861 | 921937710 | 
 
  
 |  | Institutional Shares | Institutional Plus Shares | 
| Sales Charge (Load) Imposed on Purchases |  |  | 
| Purchase Fee |  |  | 
| Sales Charge (Load) Imposed on Reinvested  Dividends |  |  | 
| Redemption Fee |  |  | 
|  | Institutional Shares | Institutional Plus Shares | 
| Management Fees | % |  | 
| 12b-1 Distribution Fee |  |  | 
| Other Expenses | % |  | 
| Total Annual Fund Operating Expenses | % |  | 
|  | 1 Year | 3 Years | 5 Years | 10 Years | 
| Institutional Shares | $ | $ | $ | $ | 
| Institutional Plus Shares | $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Small-Cap Index Fund Institutional Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| Vanguard Small-Cap Index Fund Institutional  Plus Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| CRSP US Small Cap Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Small-Cap Value Index Fund  Institutional Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Small Cap Value Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Sales Charge (Load) Imposed on Purchases |  | 
| Purchase Fee |  | 
| Sales Charge (Load) Imposed on Reinvested Dividends |  | 
| Redemption Fee |  | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Small-Cap Growth Index Fund  Institutional Shares |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| CRSP US Small Cap Growth Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
 symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether a Fund is the right investment for you. We suggest that you keep this prospectus for future reference.
  symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to mutual fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether a Fund is the right investment for you. We suggest that you keep this prospectus for future reference.| Plain Talk About Costs of Investing | 
| Costs are an important consideration in choosing a mutual fund. That is  because you, as a shareholder, pay a proportionate share of the costs of  operating a fund and any transaction costs incurred when the fund buys or  sells securities, including costs generated by shareholders of other share  classes offered by the fund. These costs can erode a substantial portion of  the gross income or the capital appreciation a fund achieves. Even  seemingly small differences in expenses can, over time, have a dramatic  effect on a fund’s performance. | 
 
 | Vanguard Fund | Asset-Weighted Median Market Capitalization | 
| Vanguard Small-Cap Index Fund | $6.7 billion | 
| Vanguard Small-Cap Value Index Fund | 6.4 billion | 
| Vanguard Small-Cap Growth Index Fund | 7.2 billion | 
 
 | Plain Talk About Growth Funds and Value Funds | 
| Growth investing and value investing are two styles employed by stock-fund  managers. Growth funds generally invest in stocks of companies believed to  have above-average potential for growth in revenue, earnings, cash flow, or  other similar criteria. These stocks typically have low dividend yields, if any,  and above-average prices in relation to measures such as earnings and book  value. Value funds typically invest in stocks whose prices are below average  in relation to those measures; these stocks often have above-average  dividend yields. Value stocks also may remain undervalued by the market for  long periods of time. Growth and value stocks have historically produced  similar long-term returns, though each category has periods when it  outperforms the other. | 
 
 | Plain Talk About Vanguard’s Unique Corporate Structure | 
| Vanguard is owned jointly by the funds it oversees and thus indirectly by the  shareholders in those funds. Most other mutual funds are operated by  management companies that are owned by third parties—either public or  private stockholders—and not by the funds they serve. | 
| Plain Talk About Distributions | 
| As a shareholder, you are entitled to your portion of a fund’s income from  interest and dividends, as well as capital gains from the fund’s sale of  investments. Income consists of both the dividends that the fund earns from  any stock holdings and the interest it receives from any money market and  bond investments. Capital gains are realized whenever the fund sells  securities for higher prices than it paid for them. These capital gains are  either short-term or long-term, depending on whether the fund held the  securities for one year or less or for more than one year. | 
| Plain Talk About Buying a Dividend | 
| Unless you are a tax-exempt investor or investing through a tax-advantaged  account (such as an IRA or an employer-sponsored retirement or savings  plan), you should consider avoiding a purchase of fund shares shortly before  the fund makes a distribution, because doing so can cost you money in  taxes. This is known as “buying a dividend.” For example: On December 15,  you invest $5,000, buying 250 shares for $20 each. If the fund pays a  distribution of $1 per share on December 16, its share price will drop to $19  (not counting market change). You still have only $5,000 (250 shares x $19 =  $4,750 in share value, plus 250 shares x $1 = $250 in distributions), but you  owe tax on the $250 distribution you received—even if you reinvest it in more  shares. To avoid buying a dividend, check a fund’s distribution schedule  before you invest. | 
|  |  |  |  |  |  | 
| For a Share Outstanding Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $87.93 | $108.36 | $93.22 | $79.37 | $63.22 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 1.544 | 1.392 | 1.367 | 1.034 | 1.101 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 14.314 | (20.461) | 15.123 | 13.889 | 16.161 | 
| Total from Investment Operations | 15.858 | (19.069) | 16.490 | 14.923 | 17.262 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (1.598) | (1.361) | (1.350) | (1.073) | (1.112) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (1.598) | (1.361) | (1.350) | (1.073) | (1.112) | 
| Net Asset Value, End of Period | $102.19 | $87.93 | $108.36 | $93.22 | $79.37 | 
| Total Return | 18.22% | -17.60% | 17.73% | 19.12% | 27.40% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $20,490 | $17,363 | $21,841 | $18,957 | $17,337 | 
| Ratio of Total Expenses to Average Net Assets | 0.04% | 0.04%2 | 0.04% | 0.04% | 0.04% | 
| Ratio of Net Investment Income to Average Net Assets | 1.66% | 1.49% | 1.29% | 1.41% | 1.49% | 
| Portfolio Turnover Rate3 | 12% | 14% | 17% | 22% | 16% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.04%. | 
| 3 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $253.81 | $312.78 | $269.07 | $229.09 | $182.49 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 4.479 | 3.998 | 4.029 | 2.988 | 3.186 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 41.301 | (59.013) | 43.607 | 40.111 | 46.645 | 
| Total from Investment Operations | 45.780 | (55.015) | 47.636 | 43.099 | 49.831 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (4.640) | (3.955) | (3.926) | (3.119) | (3.231) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (4.640) | (3.955) | (3.926) | (3.119) | (3.231) | 
| Net Asset Value, End of Period | $294.95 | $253.81 | $312.78 | $269.07 | $229.09 | 
| Total Return | 18.22% | -17.60% | 17.75% | 19.13% | 27.40% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $10,573 | $9,146 | $12,638 | $10,172 | $8,846 | 
| Ratio of Total Expenses to Average Net Assets | 0.03% | 0.03%2 | 0.03% | 0.03% | 0.03% | 
| Ratio of Net Investment Income to Average Net  Assets | 1.67% | 1.48% | 1.32% | 1.41% | 1.49% | 
| Portfolio Turnover Rate3 | 12% | 14% | 17% | 22% | 16% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.03%. | 
| 3 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $38.15 | $42.94 | $34.14 | $32.92 | $27.39 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | .915 | .796 | .781 | .597 | .684 | 
| Net Realized and Unrealized Gain (Loss) on Investments | 5.083 | (4.806) | 8.775 | 1.199 | 5.527 | 
| Total from Investment Operations | 5.998 | (4.010) | 9.556 | 1.796 | 6.211 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (.918) | (.780) | (.756) | (.576) | (.681) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (.918) | (.780) | (.756) | (.576) | (.681) | 
| Net Asset Value, End of Period | $43.23 | $38.15 | $42.94 | $34.14 | $32.92 | 
| Total Return | 15.99% | -9.31% | 28.11% | 5.86% | 22.81% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $5,564 | $4,797 | $4,733 | $3,774 | $3,632 | 
| Ratio of Total Expenses to Average Net Assets | 0.06%2 | 0.06%2 | 0.06% | 0.06% | 0.06% | 
| Ratio of Net Investment Income to Average Net Assets | 2.33% | 2.02% | 1.91% | 2.14% | 2.20% | 
| Portfolio Turnover Rate3 | 16% | 13% | 16% | 26% | 19% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.06%. | 
| 3 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $56.46 | $79.29 | $75.29 | $55.95 | $42.40 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | .410 | .465 | .367 | .319 | .327 | 
| Net Realized and Unrealized Gain (Loss) on Investments | 11.656 | (22.979) | 3.927 | 19.358 | 13.550 | 
| Total from Investment Operations | 12.066 | (22.514) | 4.294 | 19.677 | 13.877 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (.466) | (.316) | (.294) | (.337) | (.327) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (.466) | (.316) | (.294) | (.337) | (.327) | 
| Net Asset Value, End of Period | $68.06 | $56.46 | $79.29 | $75.29 | $55.95 | 
| Total Return | 21.44% | -28.39% | 5.70% | 35.31% | 32.77% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $3,462 | $2,935 | $3,805 | $3,676 | $3,218 | 
| Ratio of Total Expenses to Average Net Assets | 0.06% | 0.06%2 | 0.06% | 0.06% | 0.06% | 
| Ratio of Net Investment Income to Average Net Assets | 0.66% | 0.75% | 0.46% | 0.55% | 0.64% | 
| Portfolio Turnover Rate3 | 19% | 24% | 29% | 24% | 18% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.06%. | 
| 3 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
| Web |  | 
| Vanguard.com | For the most complete source of Vanguard news   For fund, account, and service information   For most account transactions   For literature requests   24 hours a day, 7 days a week | 
| Phone | |
| Investor Information 800-662-7447 (Text telephone for people with  hearing impairment at 800-749-7273) | For fund and service information For literature requests | 
| Client Services 800-662-2739 (Text telephone for people with  hearing impairment at 800-749-7273) | For account information For most account transactions | 
| Participant Services 800-523-1188 (Text telephone for people with  hearing impairment at 800-749-7273) | For information and services for participants in  employer-sponsored plans | 
| Institutional Division 888-809-8102 | For information and services for large institutional  investors | 
| Financial Advisor and Intermediary Sales Support 800-997-2798 | For information and services for financial intermediaries  including financial advisors, broker-dealers, trust  institutions, and insurance companies | 
| Financial Advisory and Intermediary  Trading Support 800-669-0498 | For account information and trading support for  financial intermediaries including financial advisors,  broker-dealers, trust institutions, and insurance  companies | 
| Vanguard Fund | Inception Date | Newspaper Abbreviation | Vanguard Fund Number | CUSIP Number | 
| Vanguard Small-Cap Index Fund | ||||
| Institutional Shares | 7/7/1997 (Investor Shares 10/3/1960) | SmCapInst | 857 | 922908876 | 
| Institutional Plus Shares | 12/17/2010 | SmCapIstPl | 1861 | 922908397 | 
| Vanguard Small-Cap Value Index Fund | ||||
| Institutional Shares | 12/7/1999 (Investor Shares 5/21/1998) | SmValInst | 865 | 922908785 | 
| Vanguard Small-Cap  Growth Index Fund |  |  |  |  | 
| Institutional Shares | 5/24/2000 (Investor Shares 5/21/1998) | SmGthInst | 866 | 922908819 | 
 
  
 |  | |
| Transaction Fee on Purchases and Sales |  | 
| Transaction Fee on Reinvested Dividends |  | 
| Transaction Fee on Conversion to ETF Shares |  | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Total Stock Market Index Fund ETF Shares |  |  |  | 
| Based on NAV |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| Based on Market Price |  |  |  | 
| Return Before Taxes |  |  |  | 
| CRSP US Total Market Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Transaction Fee on Purchases and Sales |  | 
| Transaction Fee on Reinvested Dividends |  | 
| Transaction Fee on Conversion to ETF Shares |  | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Extended Market Index Fund ETF Shares |  |  |  | 
| Based on NAV |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| Based on Market Price |  |  |  | 
| Return Before Taxes |  |  |  | 
| Standard & Poor’s Completion Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Transaction Fee on Purchases and Sales |  | 
| Transaction Fee on Reinvested Dividends |  | 
| Transaction Fee on Conversion to ETF Shares |  | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Large-Cap Index Fund ETF Shares |  |  |  | 
| Based on NAV |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| Based on Market Price |  |  |  | 
| Return Before Taxes |  |  |  | 
| CRSP US Large Cap Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Transaction Fee on Purchases and Sales |  | 
| Transaction Fee on Reinvested Dividends |  | 
| Transaction Fee on Conversion to ETF Shares |  | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Mid-Cap Index Fund ETF Shares |  |  |  | 
| Based on NAV |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| Based on Market Price |  |  |  | 
| Return Before Taxes |  |  |  | 
| CRSP US Mid Cap Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Transaction Fee on Purchases and Sales |  | 
| Transaction Fee on Reinvested Dividends |  | 
| Transaction Fee on Conversion to ETF Shares |  | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Small-Cap Index Fund ETF Shares |  |  |  | 
| Based on NAV |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| Based on Market Price |  |  |  | 
| Return Before Taxes |  |  |  | 
| CRSP US Small Cap Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Transaction Fee on Purchases and Sales |  | 
| Transaction Fee on Reinvested Dividends |  | 
| Transaction Fee on Conversion to ETF Shares |  | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Value Index Fund ETF Shares |  |  |  | 
| Based on NAV |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| Based on Market Price |  |  |  | 
| Return Before Taxes |  |  |  | 
| CRSP US Large Cap Value Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Transaction Fee on Purchases and Sales |  | 
| Transaction Fee on Reinvested Dividends |  | 
| Transaction Fee on Conversion to ETF Shares |  | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Mid-Cap Value Index Fund ETF Shares |  |  |  | 
| Based on NAV |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| Based on Market Price |  |  |  | 
| Return Before Taxes |  |  |  | 
| CRSP US Mid Cap Value Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Transaction Fee on Purchases and Sales |  | 
| Transaction Fee on Reinvested Dividends |  | 
| Transaction Fee on Conversion to ETF Shares |  | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Small-Cap Value Index Fund ETF Shares |  |  |  | 
| Based on NAV |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| Based on Market Price |  |  |  | 
| Return Before Taxes |  |  |  | 
| CRSP US Small Cap Value Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Transaction Fee on Purchases and Sales |  | 
| Transaction Fee on Reinvested Dividends |  | 
| Transaction Fee on Conversion to ETF Shares |  | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Growth Index Fund ETF Shares |  |  |  | 
| Based on NAV |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| Based on Market Price |  |  |  | 
| Return Before Taxes |  |  |  | 
| CRSP US Large Cap Growth Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Transaction Fee on Purchases and Sales |  | 
| Transaction Fee on Reinvested Dividends |  | 
| Transaction Fee on Conversion to ETF Shares |  | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Mid-Cap Growth Index Fund ETF Shares |  |  |  | 
| Based on NAV |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| Based on Market Price |  |  |  | 
| Return Before Taxes |  |  |  | 
| CRSP US Mid Cap Growth Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
|  | |
| Transaction Fee on Purchases and Sales |  | 
| Transaction Fee on Reinvested Dividends |  | 
| Transaction Fee on Conversion to ETF Shares |  | 
|  | |
| Management Fees | % | 
| 12b-1 Distribution Fee |  | 
| Other Expenses | % | 
| Total Annual Fund Operating Expenses | % | 
| 1 Year | 3 Years | 5 Years | 10 Years | 
| $ | $ | $ | $ | 
 
 |  | Total Return | Quarter | 
|  | % |  | 
|  | - % |  | 
|  | 1 Year | 5 Years | 10 Years | 
| Vanguard Small-Cap Growth Index Fund ETF Shares |  |  |  | 
| Based on NAV |  |  |  | 
| Return Before Taxes | % | % | % | 
| Return After Taxes on Distributions |  |  |  | 
| Return After Taxes on Distributions and Sale of Fund Shares |  |  |  | 
| Based on Market Price |  |  |  | 
| Return Before Taxes |  |  |  | 
| CRSP US Small Cap Growth Index (reflects no deduction for fees, expenses, or taxes) | % | % | % | 
| Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes) |  |  |  | 
| Vanguard Fund | Vanguard ETF Shares | Seeks to Track | 
| Total Stock Market Index Fund | Total Stock Market ETF | The overall stock market | 
| Extended Market Index Fund | Extended Market ETF | Mid- and small-cap stocks | 
| Large-Cap Index Fund | Large-Cap ETF | Large-cap stocks | 
| Mid-Cap Index Fund | Mid-Cap ETF | Mid-cap stocks | 
| Small-Cap Index Fund | Small-Cap ETF | Small-cap stocks | 
| Value Index Fund | Value ETF | Large-cap value stocks | 
| Mid-Cap Value Index Fund | Mid-Cap Value ETF | Mid-cap value stocks | 
| Small-Cap Value Index Fund | Small-Cap Value ETF | Small-cap value stocks | 
| Growth Index Fund | Growth ETF | Large-cap growth stocks | 
| Mid-Cap Growth Index Fund | Mid-Cap Growth ETF | Mid-cap growth stocks | 
| Small-Cap Growth Index Fund | Small-Cap Growth ETF | Small-cap growth stocks | 
 symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether a Fund is the right investment for you. We suggest that you keep this prospectus for future reference.
  symbol throughout the prospectus. It is used to mark detailed information about the more significant risks that you would confront as a Fund shareholder. To highlight terms and concepts important to fund investors, we have provided Plain Talk® explanations along the way. Reading the prospectus will help you decide whether a Fund is the right investment for you. We suggest that you keep this prospectus for future reference.| Plain Talk About Costs of Investing | 
| Costs are an important consideration in choosing an ETF. That is because  you, as a shareholder, pay a proportionate share of the costs of operating a  fund and any transaction costs incurred when the fund buys or sells  securities, including costs generated by shareholders of other share classes  offered by the fund. These costs can erode a substantial portion of the gross  income or the capital appreciation a fund achieves. Even seemingly small  differences in expenses can, over time, have a dramatic effect on a  fund’s performance. | 
 
 | Vanguard Fund | Asset-Weighted Median Market Capitalization | 
| Total Stock Market Index Fund | $624.8 billion | 
| Extended Market Index Fund | 12.3 billion | 
| Large-Cap Index Fund | 713.3 billion | 
| Mid-Cap Index Fund | 30.2 billion | 
| Small-Cap Index Fund | 7.4 billion | 
| Value Index Fund | 180.7 billion | 
| Mid-Cap Value Index Fund | 27.2 billion | 
| Small-Cap Value Index Fund | 6.9 billion | 
| Growth Index Fund | 1.2 trillion | 
| Mid-Cap Growth Index Fund | 33.7 billion | 
| Small-Cap Growth Index Fund | 8 billion | 
 
 | Plain Talk About Growth Funds and Value Funds | 
| Growth investing and value investing are two styles employed by stock-fund  managers. Growth funds generally invest in stocks of companies believed to  have above-average potential for growth in revenue, earnings, cash flow, or  other similar criteria. These stocks typically have low dividend yields, if any,  and above-average prices in relation to measures such as earnings and book  value. Value funds typically invest in stocks whose prices are below average  in relation to those measures; these stocks often have above-average  dividend yields. Value stocks also may remain undervalued by the market for  long periods of time. Growth and value stocks have historically produced  similar long-term returns, though each category has periods when it  outperforms the other. | 
 
  
  
  
  
  
  
  
 | Plain Talk About Vanguard’s Unique Corporate Structure | 
| Vanguard is owned jointly by the funds it oversees and thus indirectly by the  shareholders in those funds. Most other mutual funds are operated by  management companies that are owned by third parties—either public or  private stockholders—and not by the funds they serve.   | 
| Plain Talk About Distributions | 
| As a shareholder, you are entitled to your portion of a fund’s income from  interest and dividends as well as capital gains from the fund’s sale of  investments. Income consists of both the dividends that the fund earns from  any stock holdings and the interest it receives from any money market and  bond investments. Capital gains are realized whenever the fund sells  securities for higher prices than it paid for them. These capital gains are  either short-term or long-term, depending on whether the fund held the  securities for one year or less or for more than one year. | 
| Vanguard Fund | Inception Date | Vanguard Fund Number | CUSIP Number | 
| Vanguard Total Stock Market  Index Fund |  |  |  | 
| ETF Shares | 5/24/2001 (Investor Shares—4/27/1992) | 970 | 922908769 | 
| Vanguard Extended Market  Index Fund |  |  |  | 
| ETF Shares | 12/27/2001 (Investor Shares—12/21/1987) | 965 | 922908652 | 
| Vanguard Large-Cap Index  Fund |  |  |  | 
| ETF Shares | 1/27/2004 (Investor Shares—1/30/2004) | 961 | 922908637 | 
| Vanguard Mid-Cap Index Fund |  |  |  | 
| ETF Shares | 1/26/2004 (Investor Shares—5/21/1998) | 939 | 922908629 | 
| Vanguard Small-Cap Index  Fund |  |  |  | 
| ETF Shares | 1/26/2004 (Investor Shares—10/3/1960) | 969 | 922908751 | 
| Vanguard Value Index Fund |  |  |  | 
| ETF Shares | 1/26/2004 (Investor Shares—11/2/1992) | 966 | 922908744 | 
| Vanguard Mid-Cap Value Index  Fund |  |  |  | 
| ETF Shares | 8/17/2006 (Investor Shares—8/24/2006) | 935 | 922908512 | 
| Vanguard Small-Cap Value  Index Fund |  |  |  | 
| ETF Shares | 1/26/2004 (Investor Shares—5/21/1998) | 937 | 922908611 | 
| Vanguard Growth Index Fund |  |  |  | 
| ETF Shares | 1/26/2004 (Investor Shares—11/2/1992) | 967 | 922908736 | 
| Vanguard Mid-Cap Growth  Index Fund |  |  |  | 
| ETF Shares | 8/17/2006 (Investor Shares—8/24/2006) | 932 | 922908538 | 
| Vanguard Small-Cap Growth  Index Fund |  |  |  | 
| ETF Shares | 1/26/2004 (Investor Shares—5/21/1998) | 938 | 922908595   | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $191.25 | $241.49 | $194.61 | $163.70 | $127.56 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 3.411 | 3.191 | 2.912 | 2.831 | 2.809 | 
| Capital Gain Distributions Received | .0001,2 | .0001,2 | .0001,2 | — | — | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 46.002 | (50.248) | 46.898 | 30.848 | 36.236 | 
| Total from Investment Operations | 49.413 | (47.057) | 49.810 | 33.679 | 39.045 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (3.413) | (3.183) | (2.930) | (2.769) | (2.905) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (3.413) | (3.183) | (2.930) | (2.769) | (2.905) | 
| Net Asset Value, End of Period | $237.25 | $191.25 | $241.49 | $194.61 | $163.70 | 
| Total Return | 26.03% | -19.50% | 25.72% | 20.95% | 30.80% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $347,955 | $261,084 | $299,088 | $202,075 | $138,067 | 
| Ratio of Total Expenses to Average Net Assets | 0.03%3 | 0.03%3 | 0.03% | 0.03% | 0.03% | 
| Ratio of Net Investment Income to Average Net  Assets | 1.60% | 1.55% | 1.31% | 1.73% | 1.89% | 
| Portfolio Turnover Rate4 | 2% | 3% | 4% | 8% | 4% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Distribution was less than $.001 per share. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.03%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units.   | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $132.92 | $182.81 | $164.43 | $126.02 | $99.77 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 2.086 | 1.914 | 1.867 | 1.509 | 1.636 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 31.415 | (50.278) | 18.576 | 38.668 | 26.255 | 
| Total from Investment Operations | 33.501 | (48.364) | 20.443 | 40.177 | 27.891 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (2.081) | (1.526) | (2.063) | (1.767) | (1.641) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (2.081) | (1.526) | (2.063) | (1.767) | (1.641) | 
| Net Asset Value, End of Period | $164.34 | $132.92 | $182.81 | $164.43 | $126.02 | 
| Total Return | 25.39% | -26.46% | 12.44% | 32.20% | 28.04% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $17,606 | $13,089 | $17,593 | $13,761 | $8,119 | 
| Ratio of Total Expenses to Average Net Assets | 0.06%2 | 0.06%2 | 0.06% | 0.06% | 0.06% | 
| Ratio of Net Investment Income to Average Net  Assets | 1.44% | 1.31% | 1.02% | 1.20% | 1.40% | 
| Portfolio Turnover Rate3 | 11% | 11% | 19% | 19% | 13% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.06%. | 
| 3 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $174.22 | $220.44 | $175.80 | $147.88 | $114.77 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 3.079 | 2.905 | 2.646 | 2.594 | 2.581 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 44.134 | (46.233) | 44.617 | 27.890 | 33.204 | 
| Total from Investment Operations | 47.213 | (43.328) | 47.263 | 30.484 | 35.785 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (3.083) | (2.892) | (2.623) | (2.564) | (2.675) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (3.083) | (2.892) | (2.623) | (2.564) | (2.675) | 
| Net Asset Value, End of Period | $218.35 | $174.22 | $220.44 | $175.80 | $147.88 | 
| Total Return | 27.29% | -19.68% | 27.02% | 20.99% | 31.39% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $30,728 | $24,137 | $28,242 | $21,540 | $16,270 | 
| Ratio of Total Expenses to Average Net Assets | 0.04%2 | 0.04%2 | 0.04% | 0.04% | 0.04% | 
| Ratio of Net Investment Income to Average Net  Assets | 1.57% | 1.55% | 1.33% | 1.74% | 1.93% | 
| Portfolio Turnover Rate3 | 2% | 3% | 4% | 3% | 5% | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements were 0.04%. | 
| 3 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $203.84 | $254.69 | $207.00 | $178.14 | $138.08 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 3.589 | 3.302 | 2.741 | 2.772 | 2.663 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 28.686 | (50.886) | 47.811 | 29.084 | 40.043 | 
| Total from Investment Operations | 32.275 | (47.584) | 50.552 | 31.856 | 42.706 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (3.535) | (3.266) | (2.862) | (2.996) | (2.646) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (3.535) | (3.266) | (2.862) | (2.996) | (2.646) | 
| Net Asset Value, End of Period | $232.58 | $203.84 | $254.69 | $207.00 | $178.14 | 
| Total Return | 15.99% | -18.68% | 24.52% | 18.22% | 31.04% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $59,376 | $49,861 | $57,774 | $41,587 | $29,014 | 
| Ratio of Total Expenses to Average Net Assets | 0.04%2 | 0.04%2 | 0.04% | 0.04% | 0.04% | 
| Ratio of Net Investment Income to Average Net  Assets | 1.68% | 1.53% | 1.16% | 1.61% | 1.62% | 
| Portfolio Turnover Rate3 | 13% | 12% | 16% | 26% | 15% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.04%. | 
| 3 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $183.52 | $226.15 | $194.54 | $165.64 | $131.94 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 3.218 | 2.891 | 2.769 | 2.262 | 2.298 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 29.839 | (42.700) | 31.637 | 28.863 | 33.707 | 
| Total from Investment Operations | 33.057 | (39.809) | 34.406 | 31.125 | 36.005 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (3.317) | (2.821) | (2.796) | (2.225) | (2.305) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (3.317) | (2.821) | (2.796) | (2.225) | (2.305) | 
| Net Asset Value, End of Period | $213.26 | $183.52 | $226.15 | $194.54 | $165.64 | 
| Total Return | 18.21% | -17.60% | 17.72% | 19.08% | 27.37% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $50,492 | $40,593 | $50,187 | $37,492 | $27,442 | 
| Ratio of Total Expenses to Average Net Assets | 0.05% | 0.05%2 | 0.05% | 0.05% | 0.05% | 
| Ratio of Net Investment Income to Average Net  Assets | 1.66% | 1.49% | 1.25% | 1.47% | 1.49% | 
| Portfolio Turnover Rate3 | 12% | 14% | 17% | 22% | 16% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.05%. | 
| 3 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $140.37 | $147.08 | $118.98 | $119.90 | $97.84 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 3.677 | 3.529 | 3.212 | 3.055 | 3.046 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 9.034 | (6.707) | 28.045 | (.935) | 22.014 | 
| Total from Investment Operations | 12.711 | (3.178) | 31.257 | 2.120 | 25.060 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (3.671) | (3.532) | (3.157) | (3.040) | (3.000) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (3.671) | (3.532) | (3.157) | (3.040) | (3.000) | 
| Net Asset Value, End of Period | $149.41 | $140.37 | $147.08 | $118.98 | $119.90 | 
| Total Return | 9.26% | -2.05% | 26.47% | 2.23% | 25.85% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $106,042 | $99,459 | $92,776 | $61,580 | $55,909 | 
| Ratio of Total Expenses to Average Net Assets | 0.04%2 | 0.04%2 | 0.04% | 0.04% | 0.04% | 
| Ratio of Net Investment Income to Average Net  Assets | 2.61% | 2.52% | 2.35% | 2.87% | 2.76% | 
| Portfolio Turnover Rate3 | 10% | 5% | 9% | 10% | 12% | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements were 0.04%. | 
| 3 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $135.28 | $150.26 | $118.93 | $119.27 | $95.22 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 3.249 | 3.091 | 2.744 | 2.7812 | 2.497 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 9.695 | (14.996) | 31.258 | (.310) | 23.996 | 
| Total from Investment Operations | 12.944 | (11.905) | 34.002 | 2.471 | 26.493 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (3.294) | (3.075) | (2.672) | (2.811) | (2.443) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (3.294) | (3.075) | (2.672) | (2.811) | (2.443) | 
| Net Asset Value, End of Period | $144.93 | $135.28 | $150.26 | $118.93 | $119.27 | 
| Total Return | 9.77% | -7.88% | 28.74% | 2.50% | 27.98% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $16,320 | $15,995 | $16,086 | $11,061 | $10,339 | 
| Ratio of Total Expenses to Average Net Assets | 0.07%3 | 0.07%3 | 0.07% | 0.07% | 0.07% | 
| Ratio of Net Investment Income to Average Net  Assets | 2.38% | 2.22% | 1.96% | 2.69%2 | 2.26% | 
| Portfolio Turnover Rate4 | 22% | 18% | 17% | 39% | 17% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | Net investment income per share and the ratio of net investment income to average net  assets include $.362 and 0.35%, respectively, resulting from a special dividend from  NortonLifeLock Inc. in February 2020. | 
| 3 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.07%. | 
| 4 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $158.84 | $178.77 | $142.13 | $137.05 | $114.05 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 3.809 | 3.273 | 3.131 | 2.584 | 2.840 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 21.159 | (19.975) | 36.640 | 4.884 | 22.984 | 
| Total from Investment Operations | 24.968 | (16.702) | 39.771 | 7.468 | 25.824 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (3.808) | (3.228) | (3.131) | (2.388) | (2.824) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (3.808) | (3.228) | (3.131) | (2.388) | (2.824) | 
| Net Asset Value, End of Period | $180.00 | $158.84 | $178.77 | $142.13 | $137.05 | 
| Total Return | 16.00% | -9.29% | 28.07% | 5.82% | 22.76% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $27,036 | $23,786 | $26,854 | $17,837 | $14,808 | 
| Ratio of Total Expenses to Average Net Assets | 0.07%2 | 0.07%2 | 0.07% | 0.07% | 0.07% | 
| Ratio of Net Investment Income to Average Net  Assets | 2.33% | 1.99% | 1.84% | 2.23% | 2.19% | 
| Portfolio Turnover Rate3 | 16% | 13% | 16% | 26% | 19% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.07%. | 
| 3 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $213.14 | $320.83 | $253.44 | $182.31 | $134.21 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 1.786 | 1.584 | 1.483 | 1.683 | 1.773 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 97.696 | (107.775) | 67.447 | 71.131 | 48.065 | 
| Total from Investment Operations | 99.482 | (106.191) | 68.930 | 72.814 | 49.838 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (1.802) | (1.499) | (1.540) | (1.684) | (1.738) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (1.802) | (1.499) | (1.540) | (1.684) | (1.738) | 
| Net Asset Value, End of Period | $310.82 | $213.14 | $320.83 | $253.44 | $182.31 | 
| Total Return | 46.78% | -33.13% | 27.26% | 40.16% | 37.26% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $104,484 | $68,198 | $90,506 | $68,474 | $46,481 | 
| Ratio of Total Expenses to Average Net Assets | 0.04%2 | 0.04%2 | 0.04% | 0.04% | 0.04% | 
| Ratio of Net Investment Income to Average Net  Assets | 0.67% | 0.64% | 0.52% | 0.81% | 1.09% | 
| Portfolio Turnover Rate3 | 5% | 5% | 8% | 6% | 11% | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements were 0.04%. | 
| 3 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $179.73 | $254.49 | $212.00 | $158.76 | $119.58 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 1.601 | 1.405 | .870 | 1.074 | 1.386 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 39.835 | (74.767) | 42.479 | 53.347 | 39.040 | 
| Total from Investment Operations | 41.436 | (73.362) | 43.349 | 54.421 | 40.426 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (1.566) | (1.398) | (.859) | (1.181) | (1.246) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (1.566) | (1.398) | (.859) | (1.181) | (1.246) | 
| Net Asset Value, End of Period | $219.60 | $179.73 | $254.49 | $212.00 | $158.76 | 
| Total Return | 23.14% | -28.84% | 20.47% | 34.46% | 33.86% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $11,851 | $9,313 | $12,798 | $10,164 | $6,995 | 
| Ratio of Total Expenses to Average Net Assets | 0.07% | 0.07%2 | 0.07% | 0.07% | 0.07% | 
| Ratio of Net Investment Income to Average Net  Assets | 0.81% | 0.72% | 0.37% | 0.63% | 0.95% | 
| Portfolio Turnover Rate3 | 14% | 22% | 25% | 22% | 18% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.07%. | 
| 3 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
|  |  |  |  |  |  | 
| For a Share Outstanding
 Throughout Each Period | Year Ended December 31, | ||||
| 2023 | 2022 | 2021 | 2020 | 2019 | |
| Net Asset Value, Beginning of Period | $200.53 | $281.61 | $267.36 | $198.68 | $150.57 | 
| Investment Operations |  |  |  |  |  | 
| Net Investment Income1 | 1.449 | 1.623 | 1.291 | 1.129 | 1.175 | 
| Net Realized and Unrealized Gain (Loss) on  Investments | 41.356 | (81.603) | 13.975 | 68.729 | 48.077 | 
| Total from Investment Operations | 42.805 | (79.980) | 15.266 | 69.858 | 49.252 | 
| Distributions |  |  |  |  |  | 
| Dividends from Net Investment Income | (1.635) | (1.100) | (1.016) | (1.178) | (1.142) | 
| Distributions from Realized Capital Gains | — | — | — | — | — | 
| Total Distributions | (1.635) | (1.100) | (1.016) | (1.178) | (1.142) | 
| Net Asset Value, End of Period | $241.70 | $200.53 | $281.61 | $267.36 | $198.68 | 
| Total Return | 21.42% | -28.40% | 5.71% | 35.29% | 32.75% | 
| Ratios/Supplemental Data |  |  |  |  |  | 
| Net Assets, End of Period (Millions) | $15,546 | $12,036 | $16,379 | $14,436 | $9,833 | 
| Ratio of Total Expenses to Average Net Assets | 0.07% | 0.07%2 | 0.07% | 0.07% | 0.07% | 
| Ratio of Net Investment Income to Average Net  Assets | 0.66% | 0.74% | 0.45% | 0.55% | 0.64% | 
| Portfolio Turnover Rate3 | 19% | 24% | 29% | 24% | 18% | 
|  |  |  |  |  |  | 
|  |  | 
| 1 | Calculated based on average shares outstanding. | 
| 2 | The ratio of expenses to average net assets for the period net of reduction from custody fee  offset arrangements was 0.07%. | 
| 3 | Excludes the value of portfolio securities received or delivered as a result of in-kind purchases  or redemptions of the fund’s capital shares, including ETF Creation Units. | 
 
 | B-1 | |
| B-4 | |
| B-5 | |
| B-22 | |
| B-22 | |
| B-24 | |
| B-50 | |
| B-55 | |
| B-57 | |
| B-58 | |
| B-65 | |
| B-65 | 
|  | Share Classes1
 | |||||
| Vanguard Fund2
 | Investor | Admiral | Institutional | Institutional Plus | Institutional   Select | ETF | 
| Vanguard Total Stock Market Index Fund | VTSMX | VTSAX | VITSX | VSMPX | VSTSX | VTI3
 | 
| Vanguard 500 Index Fund | VFINX | VFIAX | — | — | VFFSX | VOO3
 | 
| Vanguard Extended Market Index Fund | VEXMX | VEXAX | VIEIX | VEMPX | VSEMX | VXF3
 | 
| Vanguard Large-Cap Index Fund | VLACX | VLCAX | VLISX | — | — | VV3
 | 
| Vanguard Mid-Cap Index Fund | VIMSX | VIMAX | VMCIX | VMCPX | — | VO3
 | 
| Vanguard Small-Cap Index Fund | NAESX | VSMAX | VSCIX | VSCPX | — | VB3
 | 
| Vanguard Value Index Fund | VIVAX | VVIAX | VIVIX | — | — | VTV3
 | 
| Vanguard Mid-Cap Value Index Fund | VMVIX | VMVAX | — | — | — | VOE3
 | 
| Vanguard Small-Cap Value Index Fund | VISVX | VSIAX | VSIIX | — | — | VBR3
 | 
| Vanguard Growth Index Fund | VIGRX | VIGAX | VIGIX | — | — | VUG3
 | 
| Vanguard Mid-Cap Growth Index Fund | VMGIX | VMGMX | — | — | — | VOT3
 | 
| Vanguard Small-Cap Growth Index Fund | VISGX | VSGAX | VSGIX | — | — | VBK3
 | 
| Vanguard Fund | 2021 | 2022 | 2023 | 
| Vanguard 500 Index Fund | $16,125.00 | $21,500.04 | $21,500.06 | 
| Vanguard Extended Market Index Fund | 16,999.95 | 16,999.88 | 16,999.93 | 
| Vanguard Growth Index Fund | 16,125.02 | 21,500.07 | 21,500.03 | 
| Vanguard Large Cap Index Fund | 16,125.07 | 21,500.07 | 21,500.03 | 
| Vanguard Mid-Cap Growth Index Fund | 16,999.92 | 16,999.90 | 16,999.90 | 
| Vanguard Mid-Cap Index Fund | 16,999.92 | 16,999.94 | 16,999.92 | 
| Vanguard Mid-Cap Value Index Fund | 16,999.97 | 16,999.91 | 16,999.92 | 
| Vanguard Small-Cap Growth Index Fund | 16,999.90 | 16,999.94 | 16,999.93 | 
| Vanguard Small-Cap Index Fund | 16,999.88 | 16,999.86 | 16,999.92 | 
| Vanguard Small-Cap Value Index Fund | 16,999.96 | 16,999.91 | 16,999.90 | 
| Vanguard Total Stock Market Index Fund | 16,999.94 | 16,999.95 | 16,999.94 | 
| Vanguard Value Index Fund | 16,125.06 | 21,500.05 | 21,500.05 | 
| Vanguard Fund | Capital Contribution to Vanguard | Percentage of Fund’s Average Net Assets | Percent of Vanguard Funds’ Capitalization | 
| Vanguard Total Stock Market Index Fund | $45,961,000 | Less than 0.01% | 18.38% | 
| Vanguard 500 Index Fund | 31,035,000 | Less than 0.01  | 12.41  | 
| Vanguard Extended Market Index Fund | 2,927,000 | Less than 0.01  | 1.17  | 
| Vanguard Large-Cap Index Fund | 1,437,000 | Less than 0.01  | 0.57  | 
| Vanguard Mid-Cap Index Fund | 4,827,000 | Less than 0.01  | 1.93  | 
| Vanguard Small-Cap Index Fund | 4,012,000 | Less than 0.01  | 1.60  | 
| Vanguard Value Index Fund | 4,921,000 | Less than 0.01  | 1.97  | 
| Vanguard Mid-Cap Value Index Fund | 892,000 | Less than 0.01  | 0.36  | 
| Vanguard Small-Cap Value Index Fund | 1,574,000 | Less than 0.01  | 0.63  | 
| Vanguard Growth Index Fund | 6,342,000 | Less than 0.01  | 2.54  | 
| Vanguard Mid-Cap Growth Index Fund | 707,000 | Less than 0.01  | 0.28  | 
| Vanguard Small-Cap Growth Index Fund | 962,000 | Less than 0.01  | 0.38  | 
| Annual Shared Fund Operating Expenses (Shared Expenses Deducted From Fund Assets) | |||
| Vanguard Fund | 2021 | 2022 | 2023 | 
| Vanguard 500 Index Fund |  |  |  | 
| Management and Administrative Expenses | 0.03% | 0.03% | 0.03% | 
| Marketing and Distribution Expenses | Less than 0.01  | Less than 0.01  | Less than 0.01  | 
| Vanguard Extended Market Index Fund |  |  |  | 
| Management and Administrative Expenses | 0.04% | 0.04% | 0.04% | 
| Marketing and Distribution Expenses | Less than 0.01  | Less than 0.01  | Less than 0.01  | 
| Vanguard Growth Index Fund |  |  |  | 
| Management and Administrative Expenses | 0.04% | 0.04% | 0.04% | 
| Marketing and Distribution Expenses | Less than 0.01  | Less than 0.01  | Less than 0.01  | 
| Vanguard Large-Cap Index Fund |  |  |  | 
| Management and Administrative Expenses | 0.03% | 0.03% | 0.03% | 
| Marketing and Distribution Expenses | Less than 0.01  | Less than 0.01  | Less than 0.01  | 
| Vanguard Mid-Cap Growth Index Fund |  |  |  | 
| Management and Administrative Expenses | 0.05% | 0.06% | 0.06% | 
| Marketing and Distribution Expenses | Less than 0.01  | Less than 0.01  | 0.01  | 
| Vanguard Mid-Cap Index Fund |  |  |  | 
| Management and Administrative Expenses | 0.04% | 0.04% | 0.03% | 
| Marketing and Distribution Expenses | 0.01  | Less than 0.01  | Less than 0.01  | 
| Vanguard Mid-Cap Value Index Fund |  |  |  | 
| Management and Administrative Expenses | 0.05% | 0.06% | 0.06% | 
| Marketing and Distribution Expenses | Less than 0.01  | Less than 0.01  | 0.01  | 
| Vanguard Small-Cap Growth Index Fund |  |  |  | 
| Management and Administrative Expenses | 0.05% | 0.06% | 0.06% | 
| Marketing and Distribution Expenses | Less than 0.01  | Less than 0.01  | Less than 0.01  | 
| Vanguard Small-Cap Index Fund |  |  |  | 
| Management and Administrative Expenses | 0.04% | 0.04% | 0.04% | 
| Marketing and Distribution Expenses | Less than 0.01  | Less than 0.01  | Less than 0.01  | 
| Vanguard Small-Cap Value Index Fund |  |  |  | 
| Management and Administrative Expenses | 0.06% | 0.06% | 0.06% | 
| Marketing and Distribution Expenses | Less than 0.01  | Less than 0.01  | 0.01  | 
| Vanguard Total Stock Market Index Fund |  |  |  | 
| Management and Administrative Expenses | 0.04% | 0.03% | 0.02% | 
| Marketing and Distribution Expenses | Less than 0.01  | Less than 0.01  | Less than 0.01  | 
| Vanguard Value Index Fund |  |  |  | 
| Management and Administrative Expenses | 0.03% | 0.03% | 0.03% | 
| Marketing and Distribution Expenses | Less than 0.01  | Less than 0.01  | Less than 0.01    | 
| Name, Year of Birth | Position(s) Held With  Funds | Vanguard   Funds’ Trustee/   Officer Since | Principal Occupation(s)   During the Past Five Years,   Outside Directorships, and Other Experience | Number of   Vanguard Funds   Overseen by   Trustee/Officer | 
| Interested Trustee1
 |  |  |  |  | 
| Mortimer J. Buckley (1969) | Chairman of the  Board, Chief  Executive  Officer, and  President | January 2018 | Chairman of the board (2019–present) of Vanguard  and of each of the investment companies served by  Vanguard; chief executive officer (2018–present) of  Vanguard; chief executive officer, president, and  trustee (2018–present) of each of the investment  companies served by Vanguard; president  (2017-2024) and director (2017–present) of Vanguard;  and president (2018–present) of Vanguard Marketing  Corporation. Chief investment officer (2013–2017),  managing director (2002–2017), head of the Retail  Investor Group (2006–2012), and chief information  officer (2001–2006) of Vanguard. Member of the  board of governors of the Investment Company  Institute and of FINRA. | 210 | 
| 1 Mr. Buckley is considered an “interested person” as defined in the 1940 Act because he is an officer of the Trust. | ||||
| Independent Trustees |  |  |  |  | 
| Tara Bunch (1962) | Trustee | November 2021 | Head of Global Operations at Airbnb (2020–present).  Vice President of AppleCare (2012–2020). Member of  the board of the University of California, Berkeley  School of Engineering, and Santa Clara University’s  School of Business. | 210 | 
| Emerson U. Fullwood (1948) | Trustee | January 2008 | Executive chief staff and marketing officer for North  America and corporate vice president (retired 2008) of  Xerox Corporation (document management products  and services). Former president of the Worldwide  Channels Group, Latin America, and Worldwide  Customer Service and executive chief staff officer of  Developing Markets of Xerox. Executive in residence  and 2009–2010 Distinguished Minett Professor at the  Rochester Institute of Technology. Member of the  board of directors of the University of Rochester  Medical Center, the Monroe Community College  Foundation, the United Way of Rochester, North  Carolina A&T University, Roberts Wesleyan College,  and the Rochester Philharmonic Orchestra. Trustee of  the University of Rochester. | 210 | 
| F. Joseph Loughrey (1949) | Trustee | October 2009 | President and chief operating officer (retired 2009)  and vice chairman of the board (2008–2009) of  Cummins Inc. (industrial machinery). Director of the V  Foundation. Member of the advisory council for the  College of Arts and Letters at the University of Notre  Dame. Chairman of the board of Saint Anselm  College. | 210 | 
| Mark Loughridge (1953) | Lead  Independent  Trustee | March 2012 | Senior vice president and chief financial officer (retired  2013) of IBM (information technology services).  Fiduciary member of IBM’s Retirement Plan  Committee (2004–2013), senior vice president and  general manager (2002–2004) of IBM Global  Financing, vice president and controller (1998–2002)  of IBM, and a variety of other prior management roles  at IBM. Member of the Council on Chicago Booth. | 210   | 
| Name, Year of Birth | Position(s) Held With  Funds | Vanguard  Funds’ Trustee/  Officer Since | Principal Occupation(s)  During the Past Five Years,  Outside Directorships, and Other Experience | Number of  Vanguard Funds  Overseen by  Trustee/Officer | 
| Scott C. Malpass (1962) | Trustee | March 2012 | Co-founder and managing partner (2022-present) of  Grafton Street Partners (investment advisory firm).  Chief investment officer and vice president of the  University of Notre Dame (retired 2020). Chair of the  board of Catholic Investment Services, Inc.  (investment advisors). Member of the board of  superintendence of the Institute for the Works of  Religion. Member of the Notre Dame 403(b)  Investment Committee and the board of directors of  Paxos Trust Company (finance). | 210 | 
| Deanna Mulligan (1963) | Trustee | January 2018 | Chief executive officer of Purposeful (2021–present).  Board chair (2020), chief executive officer  (2011–2020), and president (2010–2019) of The  Guardian Life Insurance Company of America. Chief  operating officer (2010–2011) and executive vice  president (2008–2010) of Individual Life and Disability  of The Guardian Life Insurance Company of America.  Director of DuPont. Member of the board of the  Economic Club of New York. Trustee of the  Partnership for New York City (business leadership),  the Chief Executives for Corporate Purpose, and the  New York-Presbyterian Hospital. | 210 | 
| Lubos Pastor (1974) | Trustee | January 2024 | Charles P. McQuaid Distinguished Service Professor  of Finance (2023-present) at the University of Chicago  Booth School of Business; Charles P. McQuaid  Professor of Finance at the University of Chicago  Booth School of Business (2009-2023). Vice  President at European Finance Association. Member  of the board of the Fama-Miller Center for Research in  Finance. Research Associate at the National Bureau  of Economic Research, and Research Fellow at the  Centre for Economic Policy and Research. Member of  Center for Research in Security Prices (CRSP) Index  Advisory Council and Advisory Board. | 210 | 
| André F. Perold (1952) | Trustee | December 2004 | George Gund Professor of Finance and Banking,  Emeritus at the Harvard Business School (retired  2011). Chief investment officer and partner of  HighVista Strategies LLC (private investment firm).  Board member of RIT Capital Partners (investment  firm). | 210 | 
| Sarah Bloom Raskin (1961) | Trustee | January 2018 | Deputy secretary (2014–2017) of the United States  Department of the Treasury. Governor (2010–2014) of  the Federal Reserve Board. Commissioner  (2007–2010) of financial regulation for the State of  Maryland. Colin W. Brown Distinguished Professor of  the Practice, Duke Law School (2021–present);  Rubenstein Fellow, Duke University (2017–2020);  Distinguished Fellow of the Global Financial Markets  Center, Duke Law School (2020–2022); and Senior  Fellow, Duke Center on Risk (2020–present). Partner  of Kaya Partners (climate policy advisory services).  Member of the board of directors of Arcadia (energy  solution technology). | 210   | 
| Name, Year of Birth | Position(s) Held With  Funds | Vanguard  Funds’ Trustee/  Officer Since | Principal Occupation(s)  During the Past Five Years,  Outside Directorships, and Other Experience | Number of  Vanguard Funds  Overseen by  Trustee/Officer | 
| Grant Reid (1959) | Trustee | July 2023 | Senior operating partner (2023–present) of CVC  Capital (alternative investment manager). Chief  executive officer and president (2014–2022) and  member of the board of directors (2015–2022) of  Mars, Incorporated (multinational manufacturer).  Member of the board of directors of Marriott  International, Inc. Member of the board of the  Sustainable Markets Initiative (environmental  services) and chair of the Sustainable Markets  Initiative’s Agribusiness Task Force. | 210 | 
| David Thomas (1956) | Trustee | July 2021 | President of Morehouse College (2018–present).  Professor of Business Administration Emeritus at  Harvard University (2017–2018) and Dean  (2011–2016) and Professor of Management at  Georgetown University, McDonough School of  Business (2016–2017). Director of DTE Energy  Company. Trustee of Common Fund. | 210 | 
| Peter F. Volanakis (1955) | Trustee | July 2009 | President and chief operating officer (retired 2010) of  Corning Incorporated (communications equipment)  and director of Corning Incorporated (2000–2010) and  Dow Corning (2001–2010). Director (2012) of SPX  Corporation (multi-industry manufacturing). Overseer  of the Amos Tuck School of Business Administration,  Dartmouth College (2001–2013). Member of the BMW  Group Mobility Council. | 210 | 
| Executive Officers |  |  |  |  | 
| Jacqueline Angell (1974) | Chief  Compliance  Officer | November 2022 | Principal of Vanguard. Chief compliance officer  (2022–present) of Vanguard and of each of the  investment companies served by Vanguard. Chief  compliance officer (2018–2022) and deputy chief  compliance officer (2017–2019) of State Street. | 210 | 
| Christine Buchanan (1970) | Chief Financial  Officer | November 2017 | Principal of Vanguard. Chief financial officer  (2021–present) and treasurer (2017–2021) of each of  the investment companies served by Vanguard.  Partner (2005–2017) at KPMG (audit, tax, and  advisory services). | 210 | 
| John Galloway (1973) | Investment  Stewardship  Officer | September 2020 | Principal of Vanguard. Investment stewardship officer  (2020–present) of each of the investment companies  served by Vanguard. Head of Investor Advocacy  (2020–present) and head of Marketing Strategy and  Planning (2017–2020) at Vanguard. Special Assistant  to the President of the United States (2015). | 210 | 
| Ashley Grim (1984) | Treasurer | February 2022 | Treasurer (2022–present) of each of the investment  companies served by Vanguard. Fund transfer agent  controller (2019–2022) and director of Audit Services  (2017–2019) at Vanguard. Senior manager  (2015–2017) at PriceWaterhouseCoopers (audit and  assurance, consulting, and tax services). | 210 | 
| Jodi Miller (1980) | Finance Director | September 2022 | Principal of Vanguard. Finance director  (2022–present) of each of the investment companies  served by Vanguard. Head of Enterprise Investment  Services (2020–present), Head of Retail Client  Services & Operations (2020–2022), and Head of  Retail Strategic Support (2018–2020) at Vanguard. | 210   | 
| Name, Year of Birth | Position(s) Held With  Funds | Vanguard  Funds’ Trustee/  Officer Since | Principal Occupation(s)  During the Past Five Years,  Outside Directorships, and Other Experience | Number of  Vanguard Funds  Overseen by  Trustee/Officer | 
| Anne E. Robinson (1970) | Secretary | September 2016 | General counsel (2016–present) of Vanguard.  Secretary (2016–present) of Vanguard and of each of  the investment companies served by Vanguard.  Managing director (2016–present) of Vanguard.  Managing director and general counsel of Global  Cards and Consumer Services (2014–2016) at  Citigroup. Counsel (2003–2014) at American Express.  Non-executive director of the board of National Grid  (energy). | 210 | 
| Michael Rollings (1963) | Finance Director | February 2017 | Finance director (2017–present) and treasurer (2017)  of each of the investment companies served by  Vanguard. Managing director (2016–present) of  Vanguard. Chief financial officer (2016–present) of  Vanguard. Director (2016–present) of Vanguard  Marketing Corporation. Executive vice president and  chief financial officer (2006–2016) of MassMutual  Financial Group. | 210 | 
| Trustee | Aggregate Compensation From the Funds1
 | Total Compensation From All Vanguard Funds Paid to Trustees2
 | 
| Mortimer J. Buckley | — | — | 
| Tara Bunch | $186,966 | $330,000 | 
| Emerson U. Fullwood | 186,966 | 330,000 | 
| F. Joseph Loughrey | 198,298 | 350,000 | 
| Mark Loughridge | 226,628 | 400,000 | 
| Scott C. Malpass | 186,966 | 330,000 | 
| Deanna Mulligan | 186,966 | 330,000 | 
| Lubos Pastor3 | — | — | 
| André F. Perold | 186,966 | 330,000 | 
| Sarah Bloom Raskin | 198,298 | 350,000 | 
| Grant Reid4 | 106,838 | 188,572 | 
| David Thomas | 186,966 | 330,000 | 
| Peter F. Volanakis | 198,298 | 350,000 | 
| Vanguard Fund | Trustee | Dollar Range of Fund Shares Owned by Trustee | Aggregate Dollar Range of Vanguard Fund Shares Owned by Trustee | 
| Vanguard 500 Index Fund | Mortimer J. Buckley | — | Over $100,000 | 
|  | Tara Bunch | — | Over $100,000 | 
|  | Emerson U. Fullwood | Over $100,000 | Over $100,000 | 
|  | F. Joseph Loughrey | — | Over $100,000 | 
|  | Mark Loughridge | — | Over $100,000 | 
|  | Scott C. Malpass | — | Over $100,000 | 
|  | Deanna Mulligan | — | Over $100,000 | 
|  | Lubos Pastor | — | Over $100,000 | 
|  | André F. Perold | — | Over $100,000 | 
|  | Sarah Bloom Raskin | — | Over $100,000 | 
|  | Grant Reid | — | Over $100,000 | 
|  | David Thomas | — | Over $100,000 | 
|  | Peter F. Volanakis | Over $100,000 | Over $100,000 | 
|  |  |  |  | 
| Vanguard Extended Market Index Fund | Mortimer J. Buckley | Over $100,000 | Over $100,000 | 
|  | Tara Bunch | — | Over $100,000 | 
|  | Emerson U. Fullwood | Over $100,000 | Over $100,000 | 
|  | F. Joseph Loughrey | Over $100,000 | Over $100,000 | 
|  | Mark Loughridge | Over $100,000 | Over $100,000 | 
|  | Scott C. Malpass | Over $100,000 | Over $100,000 | 
|  | Deanna Mulligan | — | Over $100,000 | 
|  | Lubos Pastor | — | Over $100,000 | 
|  | André F. Perold | — | Over $100,000 | 
|  | Sarah Bloom Raskin | — | Over $100,000 | 
|  | Grant Reid | — | Over $100,000 | 
|  | David Thomas | — | Over $100,000 | 
|  | Peter F. Volanakis | — | Over $100,000 | 
|  |  |  |  | 
| Vanguard Growth Index Fund | Mortimer J. Buckley | Over $100,000 | Over $100,000 | 
|  | Tara Bunch | — | Over $100,000 | 
|  | Emerson U. Fullwood | — | Over $100,000 | 
|  | F. Joseph Loughrey | — | Over $100,000 | 
|  | Mark Loughridge | — | Over $100,000 | 
|  | Scott C. Malpass | — | Over $100,000 | 
|  | Deanna Mulligan | — | Over $100,000 | 
|  | Lubos Pastor | — | Over $100,000 | 
|  | André F. Perold | — | Over $100,000 | 
|  | Sarah Bloom Raskin | $10,001 – $50,000 | Over $100,000 | 
|  | Grant Reid | — | Over $100,000 | 
|  | David Thomas | — | Over $100,000 | 
|  | Peter F. Volanakis | Over $100,000 | Over $100,000 | 
|  |  |  |  | 
| Vanguard Fund | Trustee | Dollar Range of Fund Shares Owned by Trustee | Aggregate Dollar Range of Vanguard Fund Shares Owned by Trustee | 
| Vanguard Large-Cap Index Fund | Mortimer J. Buckley | — | Over $100,000 | 
|  | Tara Bunch | — | Over $100,000 | 
|  | Emerson U. Fullwood | — | Over $100,000 | 
|  | F. Joseph Loughrey | — | Over $100,000 | 
|  | Mark Loughridge | — | Over $100,000 | 
|  | Scott C. Malpass | — | Over $100,000 | 
|  | Deanna Mulligan | — | Over $100,000 | 
|  | Lubos Pastor | — | Over $100,000 | 
|  | André F. Perold | — | Over $100,000 | 
|  | Sarah Bloom Raskin | $10,001 – $50,000 | Over $100,000 | 
|  | Grant Reid | — | Over $100,000 | 
|  | David Thomas | — | Over $100,000 | 
|  | Peter F. Volanakis | — | Over $100,000 | 
|  |  |  |  | 
| Vanguard Mid-Cap Growth Index Fund | Mortimer J. Buckley | — | Over $100,000 | 
|  | Tara Bunch | — | Over $100,000 | 
|  | Emerson U. Fullwood | — | Over $100,000 | 
|  | F. Joseph Loughrey | — | Over $100,000 | 
|  | Mark Loughridge | — | Over $100,000 | 
|  | Scott C. Malpass | — | Over $100,000 | 
|  | Deanna Mulligan | — | Over $100,000 | 
|  | Lubos Pastor | — | Over $100,000 | 
|  | André F. Perold | — | Over $100,000 | 
|  | Sarah Bloom Raskin | — | Over $100,000 | 
|  | Grant Reid | — | Over $100,000 | 
|  | David Thomas | — | Over $100,000 | 
|  | Peter F. Volanakis | — | Over $100,000 | 
|  |  |  |  | 
| Vanguard Mid-Cap Index Fund | Mortimer J. Buckley | — | Over $100,000 | 
|  | Tara Bunch | — | Over $100,000 | 
|  | Emerson U. Fullwood | — | Over $100,000 | 
|  | F. Joseph Loughrey | — | Over $100,000 | 
|  | Mark Loughridge | — | Over $100,000 | 
|  | Scott C. Malpass | — | Over $100,000 | 
|  | Deanna Mulligan | Over $100,000 | Over $100,000 | 
|  | Lubos Pastor | — | Over $100,000 | 
|  | André F. Perold | — | Over $100,000 | 
|  | Sarah Bloom Raskin | Over $100,000 | Over $100,000 | 
|  | Grant Reid | — | Over $100,000 | 
|  | David Thomas | — | Over $100,000 | 
|  | Peter F. Volanakis | $50,001 – $100,000 | Over $100,000 | 
|  |  |  |  | 
| Vanguard Fund | Trustee | Dollar Range of Fund Shares Owned by Trustee | Aggregate Dollar Range of Vanguard Fund Shares Owned by Trustee | 
| Vanguard Mid-Cap Value Index Fund | Mortimer J. Buckley | — | Over $100,000 | 
|  | Tara Bunch | — | Over $100,000 | 
|  | Emerson U. Fullwood | — | Over $100,000 | 
|  | F. Joseph Loughrey | — | Over $100,000 | 
|  | Mark Loughridge | — | Over $100,000 | 
|  | Scott C. Malpass | — | Over $100,000 | 
|  | Deanna Mulligan | — | Over $100,000 | 
|  | Lubos Pastor | — | Over $100,000 | 
|  | André F. Perold | — | Over $100,000 | 
|  | Sarah Bloom Raskin | — | Over $100,000 | 
|  | Grant Reid | — | Over $100,000 | 
|  | David Thomas | — | Over $100,000 | 
|  | Peter F. Volanakis | — | Over $100,000 | 
|  |  |  |  | 
| Vanguard Small-Cap Growth Index Fund | Mortimer J. Buckley | — | Over $100,000 | 
|  | Tara Bunch | — | Over $100,000 | 
|  | Emerson U. Fullwood | — | Over $100,000 | 
|  | F. Joseph Loughrey | — | Over $100,000 | 
|  | Mark Loughridge | — | Over $100,000 | 
|  | Scott C. Malpass | — | Over $100,000 | 
|  | Deanna Mulligan | — | Over $100,000 | 
|  | Lubos Pastor | — | Over $100,000 | 
|  | André F. Perold | — | Over $100,000 | 
|  | Sarah Bloom Raskin | — | Over $100,000 | 
|  | Grant Reid | — | Over $100,000 | 
|  | David Thomas | — | Over $100,000 | 
|  | Peter F. Volanakis | Over $100,000 | Over $100,000 | 
|  |  |  |  | 
| Vanguard Small-Cap Index Fund | Mortimer J. Buckley | — | Over $100,000 | 
|  | Tara Bunch | — | Over $100,000 | 
|  | Emerson U. Fullwood | Over $100,000 | Over $100,000 | 
|  | F. Joseph Loughrey | — | Over $100,000 | 
|  | Mark Loughridge | — | Over $100,000 | 
|  | Scott C. Malpass | — | Over $100,000 | 
|  | Deanna Mulligan | Over $100,000 | Over $100,000 | 
|  | Lubos Pastor | — | Over $100,000 | 
|  | André F. Perold | — | Over $100,000 | 
|  | Sarah Bloom Raskin | $10,001 – $50,000 | Over $100,000 | 
|  | Grant Reid | — | Over $100,000 | 
|  | David Thomas | — | Over $100,000 | 
|  | Peter F. Volanakis | Over $100,000 | Over $100,000 | 
|  |  |  |  | 
| Vanguard Fund | Trustee | Dollar Range of Fund Shares Owned by Trustee | Aggregate Dollar Range of Vanguard Fund Shares Owned by Trustee | 
| Vanguard Small-Cap Value Index Fund | Mortimer J. Buckley | — | Over $100,000 | 
|  | Tara Bunch | — | Over $100,000 | 
|  | Emerson U. Fullwood | — | Over $100,000 | 
|  | F. Joseph Loughrey | — | Over $100,000 | 
|  | Mark Loughridge | — | Over $100,000 | 
|  | Scott C. Malpass | — | Over $100,000 | 
|  | Deanna Mulligan | — | Over $100,000 | 
|  | Lubos Pastor | $50,001 – $100,000 | Over $100,000 | 
|  | André F. Perold | — | Over $100,000 | 
|  | Sarah Bloom Raskin | — | Over $100,000 | 
|  | Grant Reid | — | Over $100,000 | 
|  | David Thomas | — | Over $100,000 | 
|  | Peter F. Volanakis | Over $100,000 | Over $100,000 | 
|  |  |  |  | 
| Vanguard Total Stock Market Index Fund | Mortimer J. Buckley | Over $100,000 | Over $100,000 | 
|  | Tara Bunch | — | Over $100,000 | 
|  | Emerson U. Fullwood | Over $100,000 | Over $100,000 | 
|  | F. Joseph Loughrey | Over $100,000 | Over $100,000 | 
|  | Mark Loughridge | Over $100,000 | Over $100,000 | 
|  | Scott C. Malpass | Over $100,000 | Over $100,000 | 
|  | Deanna Mulligan | Over $100,000 | Over $100,000 | 
|  | Lubos Pastor | Over $100,000 | Over $100,000 | 
|  | André F. Perold | — | Over $100,000 | 
|  | Sarah Bloom Raskin | Over $100,000 | Over $100,000 | 
|  | Grant Reid | Over $100,000 | Over $100,000 | 
|  | David Thomas | — | Over $100,000 | 
|  | Peter F. Volanakis | Over $100,000 | Over $100,000 | 
|  |  |  |  | 
| Vanguard Value Index Fund | Mortimer J. Buckley | — | Over $100,000 | 
|  | Tara Bunch | — | Over $100,000 | 
|  | Emerson U. Fullwood | Over $100,000 | Over $100,000 | 
|  | F. Joseph Loughrey | — | Over $100,000 | 
|  | Mark Loughridge | Over $100,000 | Over $100,000 | 
|  | Scott C. Malpass | — | Over $100,000 | 
|  | Deanna Mulligan | — | Over $100,000 | 
|  | Lubos Pastor | — | Over $100,000 | 
|  | André F. Perold | — | Over $100,000 | 
|  | Sarah Bloom Raskin | $10,001 – $50,000 | Over $100,000 | 
|  | Grant Reid | Over $100,000 | Over $100,000 | 
|  | David Thomas | — | Over $100,000 | 
|  | Peter F. Volanakis | Over $100,000 | Over $100,000 | 
| Vanguard Fund | Share Class | Owner and Address | Percentage of Ownership | 
| Vanguard 500 Index Fund | Investor Shares | ASCENSUS TRUST COMPANY  FARGO, ND | 20.86% | 
|  | Admiral Shares | CHARLES SCHWAB & CO INC SAN  FRANCISCO, CA | 8.99% | 
|  |  | NATIONAL FINANCIAL SERVICES  CORP JERSEY CITY, NJ | 5.65% | 
|  | Institutional Select Shares | VANGUARD INSTITUTIONAL 500  INDEX TRUST 2040 VALLEY FORGE,  PA | 95.57% | 
| Vanguard Extended Market Index Fund | Investor Shares | SIERRA PACIFIC INDUSTRIES  EMPLOYEES’ RETIREMENT PLAN  REDDING, CA | 9.26% | 
|  |  | GRIFFON CORPORATION JERICHO,  NY | 6.19% | 
|  |  | ASCENSUS TRUST COMPANY  FARGO, ND | 5.04% | 
|  | Admiral Shares | CHARLES SCHWAB & CO INC SAN  FRANCISCO, CA | 7.10% | 
|  | Institutional Shares | TIAA, TRUST N.A CHARLOTTE, NC | 16.62% | 
|  |  | FIDELITY INVESTMENTS  INSTITUTIONAL OPERATIONS CO INC  COVINGTON, KY | 15.62% | 
|  |  | CHARLES SCHWAB & CO INC SAN  FRANCISCO, CA | 7.33% | 
|  | Institutional Select Shares | VANGUARD INSTITUTIONAL  EXTENDED MARKET INDEX TRUST  1998 VALLEY FORGE, PA | 99.86% | 
|  | Institutional Plus Shares | FIDELITY INVESTMENTS  INSTITUTIONAL OPERATIONS CO INC  COVINGTON, KY | 28.07% | 
|  |  | TIAA, TRUST N.A CHARLOTTE, NC | 24.25% | 
|  |  | STATE STREET BANK TRUST  TRANSAMERICA RETIREMENT  SOLUTIONS CORPORATION  HARRISON, NY | 10.67% | 
| Vanguard Growth Index Fund | Investor Shares | ASCENSUS TRUST COMPANY  FARGO, ND | 56.13% | 
|  | Admiral Shares | CHARLES SCHWAB & CO INC SAN  FRANCISCO, CA | 9.88% | 
|  |  | NATIONAL FINANCIAL SERVICES  CORP JERSEY CITY, NJ | 6.74% | 
|  | Institutional Shares | NEW YORK COLLEGE SAVINGS  PROGRAM NEWTON, MA | 13.30% | 
|  |  | CHARLES SCHWAB & CO INC SAN  FRANCISCO, CA | 12.81% | 
|  |  | FIDELITY INVESTMENTS  INSTITUTIONAL OPERATIONS CO INC  COVINGTON, KY | 12.34%   | 
| Vanguard Fund | Share Class | Owner and Address | Percentage of Ownership | 
| Vanguard Large-Cap Index Fund | Investor Shares | ASCENSUS TRUST COMPANY  FARGO, ND | 39.04% | 
|  |  | EAGLE CORPORATION EMPLOYEES  FLEXIBLE COMPENSATION PLAN  CHARLOTTESVILLE, VA | 16.08% | 
|  |  | QRM 401(K) RETIREMENT SAVINGS  PLAN CHICAGO, IL | 14.20% | 
|  |  | UNIVERSITY OF MINNESOTA  OPTIONAL RETIREMENT PLAN  MINNEAPOLIS, MN | 11.19% | 
|  |  | BRIGHTSPHERE INC. PROFIT  SHARING AND 401(K) PLAN BOSTON,  MA | 6.32% | 
|  |  | AEROSPACE VOLUNTARY  ANNUITY/ACCOUNT PROGRAM LOS  ANGELES, CA | 6.12% | 
|  | Institutional Shares | EMPOWER TRUST FBO EMPLOYEE  BENEFIT CLIENTS 401K  GREENWOOD VLG, CO | 11.22% | 
|  |  | NATIONAL FINANCIAL SERVICES  CORP JERSEY CITY, NJ | 8.55% | 
|  |  | CHARLES SCHWAB & CO INC SAN  FRANCISCO, CA | 7.94% | 
|  |  | MAC & CO A/C 866757 PITTSBURGH,  PA | 7.29% | 
|  |  | SEI PRIVATE TRUST COMPANY  OAKS, PA | 6.83% | 
|  |  | PLUMBERS LOCAL UNION NO. 1  JOINT PLUMBING INDUSTRY BOARD  PRUDENTIAL INVESTMENT  MANAGEMENT SVCS LLC, CUST  LONG ISLAND CITY, NY | 5.32% | 
|  |  | PERSHING LLC JERSEY CITY, NJ | 5.19% | 
|  | Admiral Shares | CHARLES SCHWAB & CO INC SAN  FRANCISCO, CA | 13.01% | 
|  |  | NATIONAL FINANCIAL SERVICES  CORP JERSEY CITY, NJ | 9.20% | 
| Vanguard Mid-Cap Growth Index Fund | Investor Shares | ASCENSUS TRUST COMPANY  FARGO, ND | 75.31% | 
|  |  | GEORGETOWN UNIVERSITY  RETIREMENT PLAN WASHINGTON,  DC | 12.02% | 
|  | Admiral Shares | CHARLES SCHWAB & CO INC SAN  FRANCISCO, CA | 12.61%   | 
| Vanguard Fund | Share Class | Owner and Address | Percentage of Ownership | 
| Vanguard Mid-Cap Index Fund | Investor Shares | ASCENSUS TRUST COMPANY  FARGO, ND | 31.16% | 
|  | Institutional Shares | FIDELITY INVESTMENTS  INSTITUTIONAL OPERATIONS CO INC  COVINGTON, KY | 14.00% | 
|  |  | FIDELITY INVESTMENTS  INSTITUTIONAL OPERATIONS CO INC  COVINGTON, KY | 9.76% | 
|  |  | TIAA, TRUST N.A CHARLOTTE, NC | 5.33% | 
|  | Admiral Shares | CHARLES SCHWAB & CO INC SAN  FRANCISCO, CA | 12.08% | 
|  |  | NATIONAL FINANCIAL SERVICES  CORP JERSEY CITY, NJ | 5.71% | 
|  | Institutional Plus Shares | FIDELITY INVESTMENTS  INSTITUTIONAL OPERATIONS CO INC  COVINGTON, KY | 21.32% | 
|  |  | MAC & CO 401K PLAN AND THE  EMPLOYEE STOCK OWNER A/C  489031 PITTSBURGH, PA | 15.63% | 
|  |  | NEW YORK COLLEGE SAVINGS  PROGRAM NEWTON, MA | 9.27% | 
|  |  | NORTHERN TRUST COMPANY FBO  ACCENTURE-DV CHICAGO, IL | 7.68% | 
| Vanguard Mid-Cap Value Index Fund | Investor Shares | ASCENSUS TRUST COMPANY  FARGO, ND | 87.10% | 
|  | Admiral Shares | CHARLES SCHWAB & CO INC SAN  FRANCISCO, CA | 16.19% | 
|  |  | NATIONAL FINANCIAL SERVICES  CORP JERSEY CITY, NJ | 7.37% | 
|  |  | FIDELITY INVESTMENTS  INSTITUTIONAL OPERATIONS CO INC  COVINGTON, KY | 5.96% | 
| Vanguard Small-Cap Growth Index Fund | Investor Shares | ASCENSUS TRUST COMPANY  FARGO, ND | 62.85% | 
|  |  | AMERISURE MUTUAL INSURANCE  CO. 401(K) SAVINGS PLAN  FARMINGTON, MI | 5.52% | 
|  | Institutional Shares | CHARLES SCHWAB & CO INC SAN  FRANCISCO, CA | 18.81% | 
|  |  | FIDELITY INVESTMENTS  INSTITUTIONAL OPERATIONS CO INC  COVINGTON, KY | 13.19% | 
|  |  | TIAA, TRUST N.A CHARLOTTE, NC | 5.39% | 
|  | Admiral Shares | CHARLES SCHWAB & CO INC SAN  FRANCISCO, CA | 10.21% | 
|  |  | NATIONAL FINANCIAL SERVICES  CORP JERSEY CITY, NJ | 5.44%   | 
| Vanguard Fund | Share Class | Owner and Address | Percentage of Ownership | 
| Vanguard Small-Cap Index Fund | Investor Shares | ASCENSUS TRUST COMPANY  FARGO, ND | 32.56% | 
|  | Admiral Shares | CHARLES SCHWAB & CO INC SAN  FRANCISCO, CA | 11.35% | 
|  |  | NATIONAL FINANCIAL SERVICES  CORP JERSEY CITY, NJ | 6.29% | 
|  | Institutional Shares | FIDELITY INVESTMENTS  INSTITUTIONAL OPERATIONS CO INC  COVINGTON, KY | 14.95% | 
|  |  | CHARLES SCHWAB & CO INC SAN  FRANCISCO, CA | 9.51% | 
|  |  | TIAA, TRUST N.A CHARLOTTE, NC | 8.46% | 
|  |  | NATIONAL FINANCIAL SERVICES  CORP JERSEY CITY, NJ | 5.51% | 
|  | Institutional Plus Shares | FIDELITY INVESTMENTS  INSTITUTIONAL OPERATIONS CO INC  COVINGTON, KY | 22.60% | 
|  |  | NEW YORK COLLEGE SAVINGS PLAN  NEWTON CENTER, MA | 11.58% | 
|  |  | MAC & CO 401K PLAN AND THE  EMPLOYEE STOCK OWNER A/C  489032 PITTSBURGH, PA | 10.60% | 
|  |  | NORTHERN TRUST COMPANY FBO  ACCENTURE-DV CHICAGO, IL | 7.80% | 
|  |  | COLLEGE SAVINGS PLAN OF  NEVADA BOSTON, MA | 6.98% | 
|  |  | TIAA, TRUST N.A CHARLOTTE, NC | 5.64% | 
| Vanguard Small-Cap Value Index Fund | Investor Shares | ASCENSUS TRUST COMPANY  FARGO, ND | 38.91% | 
|  | Institutional Shares | CHARLES SCHWAB & CO INC SAN  FRANCISCO, CA | 18.66% | 
|  |  | FIDELITY INVESTMENTS  INSTITUTIONAL OPERATIONS CO INC  COVINGTON, KY | 18.34% | 
|  |  | TIAA, TRUST N.A CHARLOTTE, NC | 10.41% | 
|  |  | NATIONAL FINANCIAL SERVICES  CORP JERSEY CITY, NJ | 9.64% | 
|  | Admiral Shares | CHARLES SCHWAB & CO INC SAN  FRANCISCO, CA | 11.64% | 
|  |  | NATIONAL FINANCIAL SERVICES  CORP JERSEY CITY, NJ | 6.82%   | 
| Vanguard Fund | Share Class | Owner and Address | Percentage of Ownership | 
| Vanguard Total Stock Market Index Fund | Investor Shares | VANGUARD LIFE STRATEGY  GROWTH FUND VALLEY FORGE, PA | 48.04% | 
|  |  | VANGUARD LIFE STRATEGY  MODERATE GROWTH FUND VALLEY  FORGE, PA | 35.24% | 
|  |  | VANGUARD LIFE STRATEGY  CONSERVATIVE GROWTH FUND  VALLEY FORGE, PA | 11.42% | 
|  | Admiral Shares | CHARLES SCHWAB & CO INC SAN  FRANCISCO, CA | 5.88% | 
|  |  | NATIONAL FINANCIAL SERVICES  CORP JERSEY CITY, NJ | 5.04% | 
|  | Institutional Shares | NATIONAL FINANCIAL SERVICES  CORP JERSEY CITY, NJ | 9.55% | 
|  |  | CHARLES SCHWAB & CO INC SAN  FRANCISCO, CA | 5.84% | 
|  | Institutional Select Shares | VANGUARD INSTITUTIONAL TOTAL  STOCK MARKET INDEX TRUST 1885  VALLEY FORGE, PA | 41.11% | 
|  |  | VANGUARD CHARITABLE PROGRAM  US TOTAL STOCK POOL  SOUTHEASTERN, PA | 5.39% | 
|  | Institutional Plus Shares | VANGUARD TARGET RETIREMENT  2045 TRUST VALLEY FORGE, PA | 7.44% | 
|  |  | VANGUARD TARGET RETIREMENT  2050 TRUST VALLEY FORGE, PA | 7.04% | 
|  |  | VANGUARD TARGET RETIREMENT  2040 TRUST VALLEY FORGE, PA | 6.95% | 
|  |  | VANGUARD TARGET RETIREMENT  2035 TRUST VALLEY FORGE, PA | 6.78% | 
|  |  | VANGUARD TARGET RETIREMENT  2045 FUND VALLEY FORGE, PA | 6.51% | 
|  |  | VANGUARD TARGET RETIREMENT  2035 FUND VALLEY FORGE, PA | 6.20% | 
|  |  | VANGUARD TARGET RETIREMENT  2040 FUND VALLEY FORGE, PA | 6.10% | 
|  |  | VANGUARD TARGET RETIREMENT  2050 FUND VALLEY FORGE, PA | 5.69% | 
|  |  | VANGUARD TARGET RETIREMENT  2030 TRUST VALLEY FORGE, PA | 5.63% | 
|  |  | VANGUARD TARGET RETIREMENT  2030 FUND VALLEY FORGE, PA | 5.26% | 
|  |  | VANGUARD TARGET RETIREMENT  2055 TRUST VALLEY FORGE, PA | 5.04% | 
| Vanguard Value Index Fund | Investor Shares | ASCENSUS TRUST COMPANY  FARGO, ND | 55.09% | 
|  | Admiral Shares | CHARLES SCHWAB & CO INC SAN  FRANCISCO, CA | 11.45% | 
|  |  | NATIONAL FINANCIAL SERVICES  CORP JERSEY CITY, NJ | 8.64% | 
|  | Institutional Shares | FIDELITY INVESTMENTS  INSTITUTIONAL OPERATIONS CO INC  COVINGTON, KY | 17.62% | 
|  |  | CHARLES SCHWAB & CO INC SAN  FRANCISCO, CA | 14.94% | 
|  |  | NEW YORK COLLEGE SAVINGS  PROGRAM NEWTON, MA | 12.66% | 
|  |  | TIAA, TRUST N.A CHARLOTTE, NC | 6.93%   | 
| Vanguard Fund | Owner | Percentage of Ownership | 
| Vanguard Extended Market ETF | Vanguard Marketing Corporation | 34.49% | 
|  | Charles Schwab & Co., Inc. | 14.51% | 
|  | National Financial Services, LLC | 13.69% | 
|  | Morgan Stanley DW, Inc. | 5.77% | 
| Vanguard Growth ETF | Charles Schwab & Co., Inc. | 21.10% | 
|  | Merill Lynch, Pierce, Fenner & Smith Inc. | 14.53% | 
|  | National Financial Services, LLC | 14.30% | 
|  | Edward D. Jones & Co. | 8.15% | 
|  | Vanguard Marketing Corporation | 6.93% | 
|  | Morgan Stanley DW, Inc. | 6.31% | 
| Vanguard Large-Cap ETF | Charles Schwab & Co., Inc. | 28.77% | 
|  | Edward D. Jones & Co. | 14.51% | 
|  | National Financial Services, LLC | 10.70% | 
|  | Vanguard Marketing Corporation | 5.63% | 
|  | Pershing, LLC | 5.45% | 
| Vanguard Mid-Cap ETF | Charles Schwab & Co., Inc. | 19.99% | 
|  | National Financial Services, LLC | 10.65% | 
|  | Edward D. Jones & Co. | 7.45% | 
|  | First Clearing, LLC | 7.10% | 
|  | UBS Financial Services, LLC | 5.73% | 
|  | Vanguard Marketing Corporation | 5.48% | 
| Vanguard Mid-Cap Growth ETF | National Financial Services, LLC | 22.93% | 
|  | Charles Schwab & Co., Inc. | 20.98% | 
|  | Morgan Stanley DW, Inc. | 7.43% | 
|  | Vanguard Marketing Corporation | 7.42% | 
| Vanguard Mid-Cap Value ETF | Charles Schwab & Co., Inc. | 23.30% | 
|  | National Financial Services, LLC | 18.72% | 
|  | Morgan Stanley DW, Inc. | 7.18% | 
|  | Edward D. Jones & Co. | 6.19% | 
|  | Ridge Clearing & Outsourcing Solutions, Inc. | 5.52% | 
|  | Vanguard Marketing Corporation | 5.37% | 
| Vanguard S&P 500 ETF | Charles Schwab & Co., Inc. | 16.82% | 
|  | Vanguard Marketing Corporation | 12.65% | 
|  | National Financial Services, LLC | 12.23% | 
| Vanguard Small-Cap ETF | Charles Schwab & Co., Inc. | 26.07% | 
|  | National Financial Services, LLC | 11.86% | 
|  | Merill Lynch, Pierce, Fenner & Smith Inc. | 8.07% | 
|  | Vanguard Marketing Corporation | 6.53% | 
|  | Morgan Stanley DW, Inc. | 5.53% | 
| Vanguard Small-Cap Growth ETF | Charles Schwab & Co., Inc. | 26.69% | 
|  | National Financial Services, LLC | 14.97% | 
|  | Merill Lynch, Pierce, Fenner & Smith Inc. | 13.38% | 
|  | Vanguard Marketing Corporation | 7.65% | 
|  | Edward D. Jones & Co. | 5.99% | 
|  | Morgan Stanley DW, Inc. | 5.64%   | 
| Vanguard Fund | Owner | Percentage of Ownership | 
| Vanguard Small-Cap Value ETF | Charles Schwab & Co., Inc. | 28.33% | 
|  | National Financial Services, LLC | 15.77% | 
|  | Merill Lynch, Pierce, Fenner & Smith Inc. | 11.94% | 
|  | VANGUARD Marketing Corporation | 7.09% | 
|  | Morgan Stanley DW, Inc. | 5.71% | 
| Vanguard Total Stock Market ETF | Vanguard Marketing Corporation | 29.23% | 
|  | Charles Schwab & Co., Inc. | 17.99% | 
|  | National Financial Services, LLC | 12.17% | 
| Vanguard Value ETF | Merill Lynch, Pierce, Fenner & Smith Inc. | 17.97% | 
|  | Charles Schwab & Co., Inc. | 16.65% | 
|  | National Financial Services, LLC | 13.53% | 
|  | Edward D. Jones & Co. | 9.26% | 
|  | Morgan Stanley DW, Inc. | 6.26% | 
| Vanguard Fund | Owner | Percentage of Ownership | 
| Vanguard Extended Market Index Fund | VANGUARD INSTITUTIONAL EXTENDED MARKET INDEX  TRUST 1998 VALLEY FORGE, PA | 29.71% | 
| Vanguard Fund | 2021 | 2022 | 2023 | 
| Vanguard Total Stock Market Index Fund | $19,467,000 | $23,150,000 | $32,625,000 | 
| Vanguard 500 Index Fund | 12,702,000 | 10,553,000 | 18,349,000 | 
| Vanguard Extended Market Index Fund | 3,801,000 | 1,993,000 | 1,799,000 | 
| Vanguard Large-Cap Index Fund | 2,796,000 | 1,223,000 | 898,000 | 
| Vanguard Mid-Cap Index Fund | 4,391,000 | 2,547,000 | 3,060,000 | 
| Vanguard Small-Cap Index Fund | 4,133,000 | 2,241,000 | 2,565,000 | 
| Vanguard Value Index Fund | 3,974,000 | 2,685,000 | 3,296,000 | 
| Vanguard Mid-Cap Value Index Fund | 2,637,000 | 1,098,000 | 602,000 | 
| Vanguard Small-Cap Value Index Fund | 2,919,000 | 1,357,000 | 1,036,000 | 
| Vanguard Growth Index Fund | 4,562,000 | 2,607,000 | 3,706,000 | 
| Vanguard Mid-Cap Growth Index Fund | 2,596,000 | 985,000 | 446,000 | 
| Vanguard Small-Cap Growth Index Fund | 2,787,000 | 1,095,000 | 630,000 | 
| Portfolio Manager |  | No. of accounts | Total assets | No. of accounts with performance-based fees | Total assets in accounts with performance-based   fees | 
| Aaron Choi | Registered investment companies1 | 6 | $1.2T | 0 | $0 | 
|  | Other pooled investment vehicles | 0 | $0 | 0 | $0 | 
|  | Other accounts | 0 | $0 | 0 | $0 | 
| Michelle Louie | Registered investment companies2 | 15 | $2.9T | 0 | $0 | 
|  | Other pooled investment vehicles | 0 | $0 | 0 | $0 | 
|  | Other accounts | 0 | $0 | 0 | $0 | 
| Gerard C. O’Reilly | Registered investment companies3 | 18 | $2.4T | 0 | $0 | 
|  | Other pooled investment vehicles | 0 | $0 | 0 | $0 | 
|  | Other accounts | 0 | $0 | 0 | $0 | 
| Walter Nejman | Registered investment companies4 | 40 | $2.9T | 0 | $0 | 
|  | Other pooled investment vehicles | 12 | $667.4B | 0 | $0 | 
|  | Other accounts | 0 | $0 | 0 | $0 | 
| Nick Birkett | Registered investment companies5 | 22 | $1.7T | 0 | $0 | 
|  | Other pooled investment vehicles | 4 | $10.8B | 0 | $0 | 
|  | Other accounts | 0 | $0 | 0 | $0 | 
| Kenny Narzikul | Registered investment companies6 | 15 | $192.2B | 0 | $0 | 
|  | Other pooled investment vehicles | 2 | $2.6B | 0 | $0 | 
|  | Other accounts | 0 | $0 | 0 | $0   | 
| Portfolio Manager |  | No. of accounts | Total assets | No. of accounts with performance-based fees | Total assets in accounts with performance-based  fees | 
| Aurélie Denis | Registered investment companies7 | 31 | $1.0T | 0 | $0 | 
|  | Other pooled investment vehicles | 14 | $675.6B | 0 | $0 | 
|  | Other accounts | 0 | $0 | 0 | $0 | 
| Awais Khan | Registered investment companies7 | 13 | $266.5B | 0 | $0 | 
|  | Other pooled investment vehicles | 0 | 0 | 0 | $0 | 
|  | Other accounts | 0 | $0 | 0 | $0 | 
| Vanguard Fund | Securities Lending Activities | 
| Vanguard 500 Index Fund |  | 
| Gross income from securities lending activities | $1,165,226 | 
| Fees paid to securities lending agent from a revenue split | $0 | 
| Fees paid for any cash collateral management service (including fees deducted from a pooled cash  collateral reinvestment vehicle) that are not included in the revenue split | $4,295 | 
| Administrative fees not included in revenue split | $10,039 | 
| Indemnification fee not included in revenue split | $0 | 
| Rebate (paid to borrower) | $635,018 | 
| Other fees not included in revenue split (specify) | $0 | 
| Aggregate fees/compensation for securities lending activities | $649,352 | 
| Net income from securities lending activities | $515,874 | 
| Vanguard Extended Market Index Fund |  | 
| Gross income from securities lending activities | $156,063,515 | 
| Fees paid to securities lending agent from a revenue split | $0 | 
| Fees paid for any cash collateral management service (including fees deducted from a pooled cash  collateral reinvestment vehicle) that are not included in the revenue split | $83,475 | 
| Administrative fees not included in revenue split | $2,616,006 | 
| Indemnification fee not included in revenue split | $0 | 
| Rebate (paid to borrower) | $11,390,150 | 
| Other fees not included in revenue split (specify) | $0 | 
| Aggregate fees/compensation for securities lending activities | $14,089,631 | 
| Net income from securities lending activities | $141,973,884 | 
| Vanguard Growth Index Fund |  | 
| Gross income from securities lending activities | $2,547,269   | 
| Vanguard Fund | Securities Lending Activities | 
| Fees paid to securities lending agent from a revenue split | $0 | 
| Fees paid for any cash collateral management service (including fees deducted from a pooled cash  collateral reinvestment vehicle) that are not included in the revenue split | $4,939 | 
| Administrative fees not included in revenue split | $35,560 | 
| Indemnification fee not included in revenue split | $0 | 
| Rebate (paid to borrower) | $173,178 | 
| Other fees not included in revenue split (specify) | $0 | 
| Aggregate fees/compensation for securities lending activities | $213,677 | 
| Net income from securities lending activities | $2,333,592 | 
| Vanguard Large-Cap Index Fund |  | 
| Gross income from securities lending activities | $1,168,931 | 
| Fees paid to securities lending agent from a revenue split | $0 | 
| Fees paid for any cash collateral management service (including fees deducted from a pooled cash  collateral reinvestment vehicle) that are not included in the revenue split | $1,200 | 
| Administrative fees not included in revenue split | $21,834 | 
| Indemnification fee not included in revenue split | $0 | 
| Rebate (paid to borrower) | $26,327 | 
| Other fees not included in revenue split (specify) | $0 | 
| Aggregate fees/compensation for securities lending activities | $49,361 | 
| Net income from securities lending activities | $1,119,570 | 
| Vanguard Mid-Cap Growth Index Fund |  | 
| Gross income from securities lending activities | $2,216,503 | 
| Fees paid to securities lending agent from a revenue split | $0 | 
| Fees paid for any cash collateral management service (including fees deducted from a pooled cash  collateral reinvestment vehicle) that are not included in the revenue split | $4,108 | 
| Administrative fees not included in revenue split | $31,450 | 
| Indemnification fee not included in revenue split | $0 | 
| Rebate (paid to borrower) | $120,166 | 
| Other fees not included in revenue split (specify) | $0 | 
| Aggregate fees/compensation for securities lending activities | $155,724 | 
| Net income from securities lending activities | $2,060,779 | 
| Vanguard Mid-Cap Index Fund |  | 
| Gross income from securities lending activities | $25,704,748 | 
| Fees paid to securities lending agent from a revenue split | $0 | 
| Fees paid for any cash collateral management service (including fees deducted from a pooled cash  collateral reinvestment vehicle) that are not included in the revenue split | $25,402 | 
| Administrative fees not included in revenue split | $456,493 | 
| Indemnification fee not included in revenue split | $0 | 
| Rebate (paid to borrower) | $1,437,596 | 
| Other fees not included in revenue split (specify) | $0 | 
| Aggregate fees/compensation for securities lending activities | $1,919,491 | 
| Net income from securities lending activities | $23,785,257 | 
| Vanguard Mid-Cap Value Index Fund |  | 
| Gross income from securities lending activities | $7,181,618 | 
| Fees paid to securities lending agent from a revenue split | $0 | 
| Fees paid for any cash collateral management service (including fees deducted from a pooled cash  collateral reinvestment vehicle) that are not included in the revenue split | $4,575 | 
| Administrative fees not included in revenue split | $141,321 | 
| Indemnification fee not included in revenue split | $0 | 
| Rebate (paid to borrower) | $285,748 | 
| Other fees not included in revenue split (specify) | $0 | 
| Aggregate fees/compensation for securities lending activities | $431,644   | 
| Vanguard Fund | Securities Lending Activities | 
| Net income from securities lending activities | $6,749,974 | 
| Vanguard Small-Cap Growth Index Fund |  | 
| Gross income from securities lending activities | $51,413,553 | 
| Fees paid to securities lending agent from a revenue split | $0 | 
| Fees paid for any cash collateral management service (including fees deducted from a pooled cash  collateral reinvestment vehicle) that are not included in the revenue split | $33,341 | 
| Administrative fees not included in revenue split | $836,134 | 
| Indemnification fee not included in revenue split | $0 | 
| Rebate (paid to borrower) | $5,350,777 | 
| Other fees not included in revenue split (specify) | $0 | 
| Aggregate fees/compensation for securities lending activities | $6,220,252 | 
| Net income from securities lending activities | $45,193,301 | 
| Vanguard Small-Cap Index Fund |  | 
| Gross income from securities lending activities | $183,725,810 | 
| Fees paid to securities lending agent from a revenue split | $0 | 
| Fees paid for any cash collateral management service (including fees deducted from a pooled cash  collateral reinvestment vehicle) that are not included in the revenue split | $87,941 | 
| Administrative fees not included in revenue split | $2,850,346 | 
| Indemnification fee not included in revenue split | $0 | 
| Rebate (paid to borrower) | $14,926,373 | 
| Other fees not included in revenue split (specify) | $0 | 
| Aggregate fees/compensation for securities lending activities | $17,864,660 | 
| Net income from securities lending activities | $165,861,150 | 
| Vanguard Small-Cap Value Index Fund |  | 
| Gross income from securities lending activities | $65,143,381 | 
| Fees paid to securities lending agent from a revenue split | $0 | 
| Fees paid for any cash collateral management service (including fees deducted from a pooled cash  collateral reinvestment vehicle) that are not included in the revenue split | $19,956 | 
| Administrative fees not included in revenue split | $953,630 | 
| Indemnification fee not included in revenue split | $0 | 
| Rebate (paid to borrower) | $3,321,695 | 
| Other fees not included in revenue split (specify) | $0 | 
| Aggregate fees/compensation for securities lending activities | $4,295,281 | 
| Net income from securities lending activities | $60,848,100 | 
| Vanguard Total Stock Market Index Fund |  | 
| Gross income from securities lending activities | $341,240,506 | 
| Fees paid to securities lending agent from a revenue split | $0 | 
| Fees paid for any cash collateral management service (including fees deducted from a pooled cash  collateral reinvestment vehicle) that are not included in the revenue split | $197,613 | 
| Administrative fees not included in revenue split | $5,670,891 | 
| Indemnification fee not included in revenue split | $0 | 
| Rebate (paid to borrower) | $26,959,264 | 
| Other fees not included in revenue split (specify) | $0 | 
| Aggregate fees/compensation for securities lending activities | $32,827,768 | 
| Net income from securities lending activities | $308,412,738 | 
| Vanguard Value Index Fund |  | 
| Gross income from securities lending activities | $7,069,105 | 
| Fees paid to securities lending agent from a revenue split | $0 | 
| Fees paid for any cash collateral management service (including fees deducted from a pooled cash  collateral reinvestment vehicle) that are not included in the revenue split | $4,967 | 
| Administrative fees not included in revenue split | $139,846 | 
| Indemnification fee not included in revenue split | $0   | 
| Vanguard Fund | Securities Lending Activities | 
| Rebate (paid to borrower) | $256,222 | 
| Other fees not included in revenue split (specify) | $0 | 
| Aggregate fees/compensation for securities lending activities | $401,035 | 
| Net income from securities lending activities | $6,668,070 | 
| Vanguard Fund | 2021 | 2022 | 2023 | 
| Vanguard 500 Index Fund | $1,559,000 | $2,643,000 | $3,653,000 | 
| Vanguard Extended Market Index Fund | 5,278,000 | 4,415,000 | 4,281,000 | 
| Vanguard Growth Index Fund | — | 718,000 | 643,000 | 
| Vanguard Large-Cap Index Fund | 208,000 | 185,000 | 137,000 | 
| Vanguard Mid-Cap Growth Index Fund | 514,000 | 546,000 | 267,000 | 
| Vanguard Mid-Cap Index Fund | 3,515,000 | 3,276,000 | 4,077,000 | 
| Vanguard Mid-Cap Value Index Fund | 681,000 | 858,000 | 1,588,000 | 
| Vanguard Small-Cap Growth Index Fund | 2,149,000 | 2,586,000 | 2,610,000 | 
| Vanguard Small-Cap Index Fund | 6,910,000 | 7,593,000 | 7,455,000 | 
| Vanguard Small-Cap Value Index Fund | 2,081,000 | 2,402,000 | 2,912,000 | 
| Vanguard Total Stock Market Index Fund | 15,697,000 | 29,443,000 | 14,332,000 | 
| Vanguard Value Index Fund | — | 1,067,000 | 2,257,000 | 
| Vanguard Fund | Regular Broker or Dealer (or Parent) | Aggregate Holdings | 
| Vanguard 500 Index Fund | BofA Securities, Inc. | $5,661,003,000 | 
|  | Citigroup, Inc. | 2,372,972,000 | 
|  | Goldman Sachs & Co. LLC | 2,821,687,000 | 
|  | J.P. Morgan Securities LLC | 12,008,107,000 | 
|  | Morgan Stanley & Co. LLC | 2,877,935,000 | 
|  | Wells Fargo Securities, LLC | 4,364,995,000 | 
| Vanguard Extended Market Index Fund | Jefferies LLC | 100,269,000 | 
| Vanguard Growth Index Fund | — | — | 
| Vanguard Large-Cap Index Fund | BofA Securities, Inc. | 252,899,000 | 
|  | Citigroup, Inc. | 104,431,000 | 
|  | Goldman Sachs & Co. LLC | 140,469,000 | 
|  | J.P. Morgan Securities LLC | 549,119,000 | 
|  | Morgan Stanley & Co. LLC | 128,174,000 | 
|  | Wells Fargo Securities, LLC | 199,598,000 | 
| Vanguard Mid-Cap Growth Index Fund | — | — | 
| Vanguard Mid-Cap Index Fund | State Street Global Markets, LLC | 508,889,000 | 
| Vanguard Mid-Cap Value Index Fund | — | — | 
| Vanguard Small-Cap Growth Index Fund | Virtu Americas LLC | 28,134,000 | 
| Vanguard Small-Cap Index Fund | Jefferies LLC | 151,597,000 | 
|  | Virtu Americas LLC | 44,335,000 | 
| Vanguard Small-Cap Value Index Fund | Jefferies LLC | 104,597,000 | 
|  | Virtu Americas LLC | 30,506,000 | 
| Vanguard Total Stock Market Index Fund | BofA Securities, Inc. | 7,105,264,000 | 
|  | Citigroup, Inc. | 2,896,449,000 | 
|  | Goldman Sachs & Co. LLC | 3,618,730,000 | 
|  | J.P. Morgan Securities LLC | 15,430,670,000 | 
|  | Jefferies LLC | 187,409,000 | 
|  | Morgan Stanley & Co. LLC | 3,602,150,000 | 
|  | Wells Fargo Securities, LLC | 5,609,073,000 | 
| Vanguard Value Index Fund | BofA Securities, Inc. | 1,887,641,000 | 
|  | Citigroup, Inc. | 769,219,000 | 
|  | Goldman Sachs & Co. LLC | 951,889,000 | 
|  | J.P. Morgan Securities LLC | 4,098,464,000 | 
|  | Morgan Stanley & Co. LLC | 956,615,000 | 
|  | Wells Fargo Securities, LLC | 1,489,803,000 | 
| (a) | Articles of Incorporation, Amended and Restated Agreement and Declaration of Trust, is filed herewith. | 
| (b) | By-Laws, Amended and Restated By-Laws, filed with Post-Effective Amendment No. 172 dated April 29, 2021, is  hereby incorporated by reference. | 
| (c) | Instruments Defining Rights of Security Holders, reference is made to Articles III and V of the Registrant’s Amended  and Restated Agreement and Declaration of Trust, refer to Exhibit (a) above. | 
| (d) | Investment Advisory Contracts, The Vanguard Group, Inc., provides investment advisory services to the Funds  pursuant to the Fifth Amended and Restated Funds’ Service Agreement, refer to Exhibit (h) below. | 
| (e) | Underwriting Contracts, not applicable. | 
| (f) | Bonus or Profit Sharing Contracts, reference is made to the section entitled “Management of the Funds” in Part B of  this Registration Statement. | 
| (g) | Custodian Agreements, for The Bank of New York Mellon, JPMorgan Chase Bank, and State Street Bank and Trust  Company, are filed herewith. | 
| (h) | Other Material Contracts, Form of Authorized Participant Agreement, filed with Post-Effective Amendment No. 120  dated September 7, 2010; Fifth Amended and Restated Funds’ Service Agreement, filed with Post-Effective  Post-Effective Amendment No. 173 dated April 29, 2022, are hereby incorporated by reference. | 
| (i) | Legal Opinion, not applicable. | 
| (j) |  | 
| (k) | Omitted Financial Statements, not applicable. | 
| (l) | Initial Capital Agreements, not applicable. | 
| (m) | Rule 12b-1 Plan, not applicable. | 
| (n) |  | 
| (o) | Reserved. | 
| (p) |  | 
| (a) | Vanguard Marketing Corporation, a wholly owned subsidiary of The Vanguard Group, Inc., is the principal  underwriter of each fund within the Vanguard group of investment companies, a family of over 200 funds. | 
| (b) | The principal business address of each named director and officer of Vanguard Marketing Corporation is 100  Vanguard Boulevard, Malvern, PA 19355. | 
| Name | Positions and Office with Underwriter | Positions and Office with Funds | 
| Matthew J. Benchener | Vice President and Chief Executive Officer  Designee | None | 
| Karin A. Risi | Vice President | None | 
| Michael Rollings | Vice President | Finance Director | 
| John E. Bisordi | General Counsel and Vice President | None | 
| Tara Buckley | Vice President | None | 
| Matthew C. Brancato | Vice President | None | 
| Mortimer J. Buckley | President | Chief Executive Officer and President | 
| Beth Morales Singh | Secretary | None | 
| Erica Green | Chief Compliance Officer | None | 
| Sarah Green | Anti-Money Laundering Officer | None | 
| Nitin Tandon | Chief Information Officer | None | 
| Manish Nagar | Chief Information Security Officer | None | 
| Salvatore L. Pantalone | Principal Financial Officer and Treasurer | None | 
| Matthew Tretter | Principal Operations Officer | None | 
| Amma Boateng | Vice President | None | 
| Carrie Simons | Assistant Secretary | None | 
| Barbara Bock | Controller | None | 
| Jason Botzler | Vice President | None | 
| Jon Cleborne | Vice President | None | 
| Kaitlyn Holmes | Vice President | None | 
| Andrew Kadjeski | Vice President | None | 
| Amy M. Laursen | Vice President | None | 
| Paul M. Jakubowski | Vice President | None | 
| John James | Vice President | None | 
| James D. Martielli | Vice President | None | 
| Armond E. Mosley | Vice President | None | 
| David Petty | Vice President | None | 
| David MacBride | Vice President | None | 
| Massy Williams | Vice President | None | 
| Jacob Buttery | Assistant Secretary | None | 
| Name | Positions and Office with Underwriter | Positions and Office with Funds | 
| Janelle McDonald | Vice President | None | 
| Parks Strobridge | Vice President | None | 
|  |  |  | 
| (c) | Not applicable. | 
| Signature | Title | Date | 
| /s/ Mortimer J. Buckley*   Mortimer J. Buckley | Chairman and Chief Executive Officer | April 25, 2024 | 
| /s/ Tara Bunch*   Tara Bunch | Trustee | April 25, 2024 | 
| /s/ Emerson U. Fullwood*   Emerson U. Fullwood | Trustee | April 25, 2024 | 
| /s/ F. Joseph Loughrey*   F. Joseph Loughrey | Trustee | April 25, 2024 | 
| /s/ Mark Loughridge*   Mark Loughridge | Trustee | April 25, 2024 | 
| /s/ Scott C. Malpass*   Scott C. Malpass | Trustee | April 25, 2024 | 
| /s/ Deanna Mulligan*   Deanna Mulligan | Trustee | April 25, 2024 | 
| /s/ Lubos Pastor*   Lubos Pastor | Trustee | April 25, 2024 | 
| /s/ André F. Perold*   André F. Perold | Trustee | April 25, 2024 | 
| /s/ Sarah Bloom Raskin*   Sarah Bloom Raskin | Trustee | April 25, 2024 | 
| /s/ Grant Reid*   Grant Reid | Trustee | April 25, 2024 | 
| /s/ David Thomas*   David Thomas   | Trustee | April 25, 2024 | 
| Signature | Title | Date | 
| /s/ Peter F. Volanakis*   Peter F. Volanakis | Trustee | April 25, 2024 | 
| /s/ Christine Buchanan*   Christine Buchanan | Chief Financial Officer | April 25, 2024 |