Vanguard Tax-Managed Balanced Fund Investment Strategy - Retail Prospectus [Member] - Vanguard Tax-Managed Balanced Fund	Dec. 31, 2025
Prospectus [Line Items]
Strategy [Heading]	<span style="font-family:Arial;font-size:10pt;font-weight:bold;">Principal Investment Strategies</span>
Strategy Narrative [Text Block]	The Fund is a balanced fund, meaning it invests in both fixed income securities and equity securities. With respect to the fixed income portion of the portfolio, the Fund employs an active management approach, investing approximately 50% to 55% of its assets in municipal securities, concentrating in high-quality municipal securities with a dollar-weighted average maturity expected to be between 6 and 12 years. Typically, the Fund invests at least 75% of its fixed income assets in municipal bonds rated in one of the top three credit-rating categories as determined by an independent bond-rating agency (e.g. Aaa, Aa, and A by Moody’s) or, if unrated, determined to be of comparable quality by the advisor.For the equity portion of the portfolio, the balance of the Fund that is not invested in municipal securities is primarily invested in common stocks. The Fund’s stock holdings are chosen from the stocks included in the Russell 1000 Index (the “Target Index”), which consists of common stocks of large- and mid-size U.S. companies. The Fund uses statistical methods to sample the Target Index, meaning that it holds a range of securities that, in the aggregate, approximates the full Target Index in terms of key risk factors and other characteristics, while seeking to achieve capital gains and income tax efficiency.For the Fund to pay tax-exempt dividends to shareholders from interest attributable to its investment in municipal securities, the Fund is required under U.S. federal income tax law to have at least 50% of the value of its total assets consist of tax-exempt obligations at the close of each quarter of the Fund’s taxable year. The Fund has in the past sold, and likely will be required in the future to sell, equity securities to comply with this requirement, which under certain market conditions will cause the Fund to realize capital gains. Although the Fund attempts to minimize capital gains when selling equity securities, there can be no guarantee that the Fund will not realize capital gains when doing so, which could result in a distribution of capital gains to shareholders.

Vanguard Tax-Managed Balanced Fund Investment Strategy - Retail Prospectus [Member] - Vanguard Tax-Managed Balanced Fund

Dec. 31, 2025

<span style="font-family:Arial;font-size:10pt;font-weight:bold;">Principal Investment Strategies</span>

Strategy Narrative [Text Block]

The Fund is a balanced fund, meaning it invests in both fixed income securities and equity securities. With respect to the fixed income portion of the portfolio, the Fund employs an active management approach, investing approximately 50% to 55% of its assets in municipal securities, concentrating in high-quality municipal securities with a dollar-weighted average maturity expected to be between 6 and 12 years. Typically, the Fund invests at least 75% of its fixed income assets in municipal bonds rated in one of the top three credit-rating categories as determined by an independent bond-rating agency (e.g. Aaa, Aa, and A by Moody’s) or, if unrated, determined to be of comparable quality by the advisor.For the equity portion of the portfolio, the balance of the Fund that is not invested in municipal securities is primarily invested in common stocks. The Fund’s stock holdings are chosen from the stocks included in the Russell 1000 Index (the “Target Index”), which consists of common stocks of large- and mid-size U.S. companies. The Fund uses statistical methods to sample the Target Index, meaning that it holds a range of securities that, in the aggregate, approximates the full Target Index in terms of key risk factors and other characteristics, while seeking to achieve capital gains and income tax efficiency.For the Fund to pay tax-exempt dividends to shareholders from interest attributable to its investment in municipal securities, the Fund is required under U.S. federal income tax law to have at least 50% of the value of its total assets consist of tax-exempt obligations at the close of each quarter of the Fund’s taxable year. The Fund has in the past sold, and likely will be required in the future to sell, equity securities to comply with this requirement, which under certain market conditions will cause the Fund to realize capital gains. Although the Fund attempts to minimize capital gains when selling equity securities, there can be no guarantee that the Fund will not realize capital gains when doing so, which could result in a distribution of capital gains to shareholders.