Vanguard Tax-Managed Small-Cap Fund Investment Risks - Retail Prospectus [Member] - Vanguard Tax-Managed Small-Cap Fund	Dec. 31, 2025
Prospectus [Line Items]
Risk [Text Block]	• Index Investing. The Fund is subject to risks associated with index investing. Because the Fund does not hold all of the securities included in the Target Index, it is subject to the risk that the representative sample of securities selected by the advisor will, in the aggregate, vary from the investment profile of the full Target Index. Additionally, the performance of the Fund’s investments, in the aggregate, may not match the investment performance of the Target Index. This risk, known as tracking error risk, may be heightened during times of increased market volatility or under other unusual market conditions. The Fund also could be negatively impacted by changes to the Target Index made by the index provider or by errors made by the index provider. Any gains, losses, or costs associated with or resulting from an error made by the index provider will generally be borne by the Fund and, as a result, the Fund’s shareholders.
Tax Managed Investing Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	• Tax-Managed Investing. There is no guarantee that the Fund will be able to successfully implement its tax-management strategy. Market conditions or other circumstances may limit the Fund’s ability to generate tax losses or to generate dividend income taxed at favorable tax rates. The Fund has, and may in the future, distribute current income or capital gains. Though the Fund seeks to invest in the stocks that make up its Target Index, its ability to do so may be affected by its tax-management strategy. As a result, the Fund’s pre-tax performance may be lower than that of a similar fund that is not tax-managed. The Fund’s tax-management strategy may also cause the Fund to underperform the broader market. For example, the Fund may hold a security in order to achieve more favorable tax-treatment or sell a security to create tax losses, either of which may impact returns.
General Market Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	• General Market Risk. The markets in which the Fund invests can be affected by a variety of factors. These factors, which can be real or perceived, may include economic, market, political, and regulatory conditions and developments as well as local, regional, or global events such as wars, military conflicts, natural disasters, and public health issues. In addition, investor sentiment and expectations regarding these factors can also impact the markets. Different parts of the market, including different industries and sectors as well as different types of securities, may react differently to factors that affect the market. These factors can contribute to market uncertainty, market volatility, and fluctuations in the value of the Fund’s investments, thereby resulting in potential losses to the Fund over short or long periods.
Investing in Equity Markets Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	• Investing in Equity Markets. The Fund invests in the equity markets. Equity markets have historically been cyclical, having periods of time when stock values rise and fall. Market volatility can lead to significant fluctuations in stock values, resulting in potential losses to the Fund.
Market Capitalization Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	• Market Capitalization (Market Cap). Companies are generally classified into three types of market cap depending on their size: small-, mid-, and large-cap. Companies can be further classified into micro- or mega-cap. Different factors can affect each market cap uniquely, and historically small- and mid-cap stocks have typically been more volatile due to the effects of changing economic conditions. Large companies may not reach the same levels of growth or performance as smaller companies, and they may be slower to react to competitive challenges. The performance of funds that invest in a subset of market caps could diverge from the performance of a fund that is focused on a broader representation of the stock market.
Concentration Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	• Concentration Risk. Except as may be necessary to approximate the composition of its Target Index, the Fund will not concentrate its investments in the securities of issuers whose principal business activities are in the same industry or group of industries. If the Target Index becomes concentrated and the Fund needs to concentrate in the same industry or group of industries, its performance could be negatively impacted by the industry or industries in which it is concentrated.
Risk Lose Money [Member]
Prospectus [Line Items]
Risk [Text Block]	As with any investment, an investment in the Fund could lose money over any time period.
Risk Not Insured Depository Institution [Member]
Prospectus [Line Items]
Risk [Text Block]	An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Vanguard Tax-Managed Small-Cap Fund Investment Risks - Retail Prospectus [Member] - Vanguard Tax-Managed Small-Cap Fund

Dec. 31, 2025

• Index Investing. The Fund is subject to risks associated with index investing. Because the Fund does not hold all of the securities included in the Target Index, it is subject to the risk that the representative sample of securities selected by the advisor will, in the aggregate, vary from the investment profile of the full Target Index. Additionally, the performance of the Fund’s investments, in the aggregate, may not match the investment performance of the Target Index. This risk, known as tracking error risk, may be heightened during times of increased market volatility or under other unusual market conditions. The Fund also could be negatively impacted by changes to the Target Index made by the index provider or by errors made by the index provider. Any gains, losses, or costs associated with or resulting from an error made by the index provider will generally be borne by the Fund and, as a result, the Fund’s shareholders.

Tax Managed Investing Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

• Tax-Managed Investing. There is no guarantee that the Fund will be able to successfully implement its tax-management strategy. Market conditions or other circumstances may limit the Fund’s ability to generate tax losses or to generate dividend income taxed at favorable tax rates. The Fund has, and may in the future, distribute current income or capital gains. Though the Fund seeks to invest in the stocks that make up its Target Index, its ability to do so may be affected by its tax-management strategy. As a result, the Fund’s pre-tax performance may be lower than that of a similar fund that is not tax-managed. The Fund’s tax-management strategy may also cause the Fund to underperform the broader market. For example, the Fund may hold a security in order to achieve more favorable tax-treatment or sell a security to create tax losses, either of which may impact returns.

General Market Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

• General Market Risk. The markets in which the Fund invests can be affected by a variety of factors. These factors, which can be real or perceived, may include economic, market, political, and regulatory conditions and developments as well as local, regional, or global events such as wars, military conflicts, natural disasters, and public health issues. In addition, investor sentiment and expectations regarding these factors can also impact the markets. Different parts of the market, including different industries and sectors as well as different types of securities, may react differently to factors that affect the market. These factors can contribute to market uncertainty, market volatility, and fluctuations in the value of the Fund’s investments, thereby resulting in potential losses to the Fund over short or long periods.

Investing in Equity Markets Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

• Investing in Equity Markets. The Fund invests in the equity markets. Equity markets have historically been cyclical, having periods of time when stock values rise and fall. Market volatility can lead to significant fluctuations in stock values, resulting in potential losses to the Fund.

Market Capitalization Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

• Market Capitalization (Market Cap). Companies are generally classified into three types of market cap depending on their size: small-, mid-, and large-cap. Companies can be further classified into micro- or mega-cap. Different factors can affect each market cap uniquely, and historically small- and mid-cap stocks have typically been more volatile due to the effects of changing economic conditions. Large companies may not reach the same levels of growth or performance as smaller companies, and they may be slower to react to competitive challenges. The performance of funds that invest in a subset of market caps could diverge from the performance of a fund that is focused on a broader representation of the stock market.

Concentration Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

• Concentration Risk. Except as may be necessary to approximate the composition of its Target Index, the Fund will not concentrate its investments in the securities of issuers whose principal business activities are in the same industry or group of industries. If the Target Index becomes concentrated and the Fund needs to concentrate in the same industry or group of industries, its performance could be negatively impacted by the industry or industries in which it is concentrated.

Risk Lose Money [Member]

Prospectus [Line Items]

Risk [Text Block]

As with any investment, an investment in the Fund could lose money over any time period.

Risk Not Insured Depository Institution [Member]

Prospectus [Line Items]

Risk [Text Block]

An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.