Label	Element	Value
Risk Return Abstract	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	Vanguard Tax-Managed Funds
Prospectus Date	rr_ProspectusDate	Apr. 29, 2025
Retail | Vanguard Tax-Managed Balanced Fund
Risk Return Abstract	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	<span style="color:#000000;font-family:Arial;font-size:13pt;font-weight:bold;">Vanguard Tax-Managed Balanced Fund</span>
Objective [Heading]	rr_ObjectiveHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">Investment Objective</span>
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The Fund seeks to provide a tax-efficient return consisting of federally tax-exempt income, long-term capital appreciation, and a modest amount of taxable current income.
Expense [Heading]	rr_ExpenseHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">Fees and Expenses</span>
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	The following tables describe the fees and expenses you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and example below.
Shareholder Fees Caption [Text]	rr_ShareholderFeesCaption	<span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;">Shareholder Fees</span> <br/><span style="color:#000000;font-family:Arial;font-size:8.5pt;">(Fees paid directly from your investment)</span>
Operating Expenses Caption [Text]	rr_OperatingExpensesCaption	<span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;">Annual Fund Operating Expenses</span> <br/><span style="color:#000000;font-family:Arial;font-size:8.5pt;">(Expenses that you pay each year as a percentage of the value of your investment)</span>
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	<span style="color:#000000;font-family:Arial;font-size:9.5pt;">Portfolio Turnover</span>
Portfolio Turnover [Text Block]	rr_PortfolioTurnoverTextBlock	The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). The Fund may be required to sell securities to comply with certain requirements under the tax laws. A higher portfolio turnover rate may indicate higher transaction costs and may result in more taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the previous expense example, reduce the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 20% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	20.00%
Expense Example [Heading]	rr_ExpenseExampleHeading	<span style="color:#000000;font-family:Arial;font-size:9.5pt;">Example</span>
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. It illustrates the hypothetical expenses that you would incur over various periods if you were to invest $10,000 in the Fund’s shares. This example assumes that the Fund provides a return of 5% each year and that total annual fund operating expenses remain as stated in the preceding table. You would incur these hypothetical expenses whether or not you were to redeem your investment at the end of the given period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading]	rr_StrategyHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">Principal Investment Strategies</span>
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	The Fund invests approximately 50% to 55% of its assets in municipal securities and the balance in common stocks. The fixed income portion of the Fund is concentrated in high-quality municipal securities with a dollar-weighted average maturity expected to be between 6 and 12 years. At least 75% of the municipal bonds purchased by the Fund will be 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 Ratings or AAA, AA, and A by S&P Global Ratings) or, if unrated, determined to be of comparable quality by the advisor. The Fund’s stock holdings are chosen from the stocks that are included in the Russell 1000 Index (the Index)—an index that is made up of stocks of large- and mid-capitalization U.S. companies. The Fund uses statistical methods to “sample” the Index, aiming to ensure capital gains and income tax efficiency while approximating other characteristics and the performance of the Index.
Risk [Heading]	rr_RiskHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">Principal Risks</span>
Risk [Text Block]	rr_RiskTextBlock	• Tax-managed investing risk, which is the chance that 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’s tax-managed strategy may cause the Fund to hold a security in order to achieve more favorable tax-treatment or to sell a security in order to create tax losses, which may impact returns. Although the Fund intends to track the performance of the Index with respect to the stocks included in the portfolio, the tracking may fluctuate periodically based on the sampling of the Index for tax efficiency.
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">Annual Total Returns</span>
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Fund compare with those of relevant market indexes and a composite bond/stock index, which have investment characteristics similar to those of the Fund. Vanguard Tax-Managed Balanced Composite Index consists of two unmanaged benchmarks, weighted 50% in the Russell 1000 Index and 50% in the Bloomberg 1–15 Year Municipal Bond Index. Keep in mind that the Fund’s past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	<span style="font-family:Arial;font-size:9.5pt;">The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Fund compare with those of relevant market indexes and a composite bond/stock index, which have investment characteristics similar to those of the Fund. Vanguard Tax-Managed Balanced Composite Index consists of two unmanaged benchmarks, weighted 50% in the Russell 1000 Index and 50% in the Bloomberg 1–15 Year Municipal Bond Index.</span>
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	<span style="font-family:Arial;font-size:9.5pt;font-style:italic;">vanguard.com/performance</span>
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	<span style="font-family:Arial;font-size:9.5pt;"> Keep in mind that the Fund’s past performance (before and after </span><span style="font-family:Arial;font-size:9.5pt;">taxes) does not indicate how the Fund will perform in the future.</span>
Bar Chart [Heading]	rr_BarChartHeading	<span style="font-family:Arial;font-size:8pt;font-weight:bold;">Annual Total Returns — Vanguard Tax-Managed Balanced Fund Admiral Shares</span>
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	During the periods shown in the bar chart, the highest and lowest returns for a calendar quarter were:
Performance Table Heading	rr_PerformanceTableHeading	<span style="font-family:Arial;font-size:8.5pt;font-weight:bold;">Average Annual Total Returns for Periods Ended December 31, 2024</span>
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	<span style="color:#000000;font-family:Arial;font-size:9.5pt;">When after-tax returns are calculated, it is </span><span style="color:#000000;font-family:Arial;font-size:9.5pt;">assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. </span>
Performance Table Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	<span style="color:#000000;font-family:Arial;font-size:9.5pt;">Please note that after-tax returns are not relevant for a shareholder </span><span style="color:#000000;font-family:Arial;font-size:9.5pt;">who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. </span>
Performance Table Explanation after Tax Higher	rr_PerformanceTableExplanationAfterTaxHigher	<span style="color:#000000;font-family:Arial;font-size:9.5pt;">Also, figures captioned </span><span style="color:#000000;font-family:Arial;font-size:9.5pt;font-style:italic;">Return After Taxes on Distributions and Sale of Fund Shares</span><span style="color:#000000;font-family:Arial;font-size:9.5pt;"> may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.</span>
Performance Table Closing [Text Block]	rr_PerformanceTableClosingTextBlock	Actual after-tax returns depend on your tax situation and may differ from those shown in the preceding table. When after-tax returns are calculated, it is assumed that the shareholder was in the highest individual federal marginal income tax bracket at the time of each distribution of income or capital gains or upon redemption. State and local income taxes are not reflected in the calculations. Please note that after-tax returns are not relevant for a shareholder who holds fund shares in a tax-deferred account, such as an individual retirement account or a 401(k) plan. Also, figures captioned Return After Taxes on Distributions and Sale of Fund Shares may be higher than other figures for the same period if a capital loss occurs upon redemption and results in an assumed tax deduction for the shareholder.
Retail | Vanguard Tax-Managed Balanced Fund | Risk Lose Money [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	The Fund is subject to the risks associated with the stock and bond markets, any of which could cause an investor to lose money, and the level of risk may vary based on market conditions. However, because stock and bond prices can move in different directions or to different degrees, the Fund’s bond holdings may counteract some of the volatility experienced by the Fund’s stock holdings. With 50% to 55% of its assets in municipal securities and 45% to 50% of its assets in stocks, the Fund is proportionately subject to:
Retail | Vanguard Tax-Managed Balanced Fund | Risk Not Insured Depository Institution [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	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.
Retail | Vanguard Tax-Managed Balanced Fund | Interest Rate Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	• Interest rate risk, which is the chance that bond prices overall will decline because of rising interest rates.
Retail | Vanguard Tax-Managed Balanced Fund | Credit Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	• Credit risk, which is the chance that a bond issuer will fail to pay interest or principal in a timely manner or that negative perceptions of the issuer’s ability to make such payments will cause the price of that bond to decline.
Retail | Vanguard Tax-Managed Balanced Fund | Call Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	• Call risk, which is the chance that during periods of falling interest rates, issuers of callable bonds may call (redeem) securities with higher coupon rates or interest rates before their maturity dates, causing the Fund to lose any price appreciation above the bond’s call price and forcing it to reinvest the unanticipated proceeds at lower interest rates that may result in a decline in the Fund’s income.
Retail | Vanguard Tax-Managed Balanced Fund | Income Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	• Income risk, which is the chance that the Fund’s income will decline because of falling interest rates.
Retail | Vanguard Tax-Managed Balanced Fund | Liquidity Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	• Liquidity risk, which is the chance that the Fund may not be able to sell a security in a timely manner at a desired price.
Retail | Vanguard Tax-Managed Balanced Fund | Manager Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	• Manager risk, which is the chance that poor security selection will cause the Fund to underperform relevant benchmarks or other funds with a similar investment objective.
Retail | Vanguard Tax-Managed Balanced Fund | Stock Market Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	• Stock market risk, which is the chance that stock prices overall will decline. Stock markets tend to move in cycles, with periods of rising prices and periods of falling prices. The benchmark index for the stock portion of the Fund tracks a subset of the U.S. stock market, which could cause the Fund to perform differently from the overall stock market. In addition, the Fund’s benchmark index may, at times, become focused in stocks of a particular market sector, which would subject the Fund to proportionately higher exposure to the risks of that sector.
Retail | Vanguard Tax-Managed Balanced Fund | Investment Style Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	• Investment style risk, which is the chance that returns from large- and mid-capitalization stocks will trail returns from the overall stock market. Large- and mid-cap stocks each tend to go through cycles of doing better—or worse—than other segments of the stock market or the stock market in general. These periods have, in the past, lasted for as long as several years. Historically, mid-cap stocks have been more volatile in price than large-cap stocks. The stock prices of mid-size companies tend to experience greater volatility because, among other things, these companies tend to be more sensitive to changing economic conditions.
Retail | Vanguard Tax-Managed Balanced Fund | Tax Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	• Tax risk, which, in the case of the municipal securities held by the Fund, is the chance that all or a portion of the tax-exempt income from municipal bonds held by the Fund will be declared taxable, possibly with retroactive effect, because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service or state or local tax authorities, or noncompliant conduct of a bond issuer. For the stocks held by the Fund, this is the chance that the Fund may hold on to a security longer than expected to reduce turnover, which may cause the Fund to pay out distributions or may impact the Fund’s return.
Retail | Vanguard Tax-Managed Balanced Fund | Admiral Shares
Risk Return Abstract	rr_RiskReturnAbstract
Purchase Fee	rr_MaximumCumulativeSalesChargeOverOther	none
Sales Charge (Load) Imposed on Purchases	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Sales Charge (Load) Imposed on Reinvested Dividends	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Redemption Fee	rr_RedemptionFeeOverRedemption	none
Account Service Fee Per Year (for certain fund account balances below $5,000,000)	rr_MaximumAccountFee	$ 25
Management Fees	rr_ManagementFeesOverAssets	0.08%
12b-1 Distribution Fee	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses	rr_OtherExpensesOverAssets	0.01%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.09%
1 Year	rr_ExpenseExampleYear01	$ 9
3 Years	rr_ExpenseExampleYear03	29
5 Years	rr_ExpenseExampleYear05	51
10 Years	rr_ExpenseExampleYear10	$ 115
2015	rr_AnnualReturn2015	2.35%
2016	rr_AnnualReturn2016	5.94%
2017	rr_AnnualReturn2017	12.64%
2018	rr_AnnualReturn2018	(1.43%)
2019	rr_AnnualReturn2019	18.01%
2020	rr_AnnualReturn2020	13.30%
2021	rr_AnnualReturn2021	13.10%
Annual Return 2022	rr_AnnualReturn2022	(12.66%)
2023	rr_AnnualReturn2023	15.53%
2024	rr_AnnualReturn2024	12.17%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	<span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;">Highest</span>
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2020
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	11.64%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	<span style="color:#000000;font-family:Arial;font-size:8pt;margin-left:0.0pt;">Lowest</span>
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Mar. 31, 2020
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(10.24%)
1 Year	rr_AverageAnnualReturnYear01	12.17%
5 Years	rr_AverageAnnualReturnYear05	7.72%
10 Years	rr_AverageAnnualReturnYear10	7.50%
Retail | Vanguard Tax-Managed Balanced Fund | Return After Taxes on Distributions | Admiral Shares
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	11.99%
5 Years	rr_AverageAnnualReturnYear05	7.54%
10 Years	rr_AverageAnnualReturnYear10	7.30%
Retail | Vanguard Tax-Managed Balanced Fund | Return After Taxes on Distributions and Sale of Fund Shares | Admiral Shares
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	7.97%
5 Years	rr_AverageAnnualReturnYear05	6.32%
10 Years	rr_AverageAnnualReturnYear10	6.29%
Retail | Vanguard Tax-Managed Balanced Fund | Tax-Managed Balanced Composite Index (reflects no deduction for fees, expenses, or taxes)
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	12.32%
5 Years	rr_AverageAnnualReturnYear05	8.08%
10 Years	rr_AverageAnnualReturnYear10	7.75%
Retail | Vanguard Tax-Managed Balanced Fund | Bloomberg Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	1.05%
5 Years	rr_AverageAnnualReturnYear05	0.99%
10 Years	rr_AverageAnnualReturnYear10	2.25%
Retail | Vanguard Tax-Managed Balanced Fund | Dow Jones U.S. Total Stock Market Float Adjusted Index (reflects no deduction for fees, expenses, or taxes)
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	23.88%
5 Years	rr_AverageAnnualReturnYear05	13.78%
10 Years	rr_AverageAnnualReturnYear10	12.48%