Vanguard Total Treasury ETF Investment Risks - ETF Prospectus [Member] - Vanguard Total Treasury ETF	Sep. 30, 2024
Prospectus [Line Items]
Risk [Text Block]	• Interest rate risk, which is the chance that bond prices overall will decline because of rising interest rates.• Indexing risks. The Fund is subject to risks associated with index investing. Because the Fund generally seeks to track the performance of its target index regardless of how that index is performing, the Fund’s performance may be lower than it would be if the Fund were actively managed. Additionally, because the Fund does not hold all of the securities included in its 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 its full target index. The performance of the Fund’s investments, in the aggregate, may not match the investment performance of its 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.Because the Fund is an exchange-traded fund (ETF) and the Fund’s shares are traded on an exchange, the Fund is subject to additional risks:
Income Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	• Income risk, which is the chance that a Fund’s income will decline because of falling interest rates. A fund’s income declines when interest rates fall because the fund then must invest new cash flow and cash from maturing bonds in lower- yielding bonds. Income risk is generally high for short-term bond funds and moderate for intermediate-term bond funds, so investors should expect the Fund’s monthly income to fluctuate accordingly.
Income Fluctuations [Member]
Prospectus [Line Items]
Risk [Text Block]	• Income fluctuations. The Fund’s quarterly income distributions are likely to fluctuate considerably more than the income distributions of a typical bond fund. In fact, under certain conditions, the Fund may not have any income to distribute. Income fluctuations associated with changes in interest rates are expected to be low; however, income fluctuations associated with changes in inflation are expected to be high.
ETF exchange_volatility Risk [Member]
Prospectus [Line Items]
Risk [Text Block]	• The Fund’s ETF Shares are listed for trading on NYSE Arca and are bought and sold on the secondary market at market prices. Although it is expected that the market price of an ETF Share typically will approximate its net asset value (NAV), there may be times when the market price and the NAV differ significantly. Thus, you may pay more or less than NAV when you buy ETF Shares on the secondary market, and you may receive more or less than NAV when you sell those shares.
ETF_active trading_increased risk [Member]
Prospectus [Line Items]
Risk [Text Block]	• Although the Fund’s ETF Shares are listed for trading on NYSE Arca, it is possible that an active trading market may not be maintained.
ETF_trading halted risk [Member]
Prospectus [Line Items]
Risk [Text Block]	• Trading of the Fund’s ETF Shares may be halted by the activation of individual or marketwide trading halts (which halt trading for a specific period of time when the price of a particular security or overall market prices decline by a specified percentage). Trading of the Fund’s ETF Shares may also be halted if (1) the shares are delisted from NYSE Arca without first being listed on another exchange or (2) NYSE Arca officials determine that such action is appropriate in the interest of a fair and orderly market or for the protection of investors.
Risk Lose Money [Member]
Prospectus [Line Items]
Risk [Text Block]	An investment in the Fund could lose money over short or long periods of time.
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 Total Treasury ETF Investment Risks - ETF Prospectus [Member] - Vanguard Total Treasury ETF

Sep. 30, 2024

• Interest rate risk, which is the chance that bond prices overall will decline because of rising interest rates.• Indexing risks. The Fund is subject to risks associated with index investing. Because the Fund generally seeks to track the performance of its target index regardless of how that index is performing, the Fund’s performance may be lower than it would be if the Fund were actively managed. Additionally, because the Fund does not hold all of the securities included in its 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 its full target index. The performance of the Fund’s investments, in the aggregate, may not match the investment performance of its 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.Because the Fund is an exchange-traded fund (ETF) and the Fund’s shares are traded on an exchange, the Fund is subject to additional risks:

Income Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

• Income risk, which is the chance that a Fund’s income will decline because of falling interest rates. A fund’s income declines when interest rates fall because the fund then must invest new cash flow and cash from maturing bonds in lower- yielding bonds. Income risk is generally high for short-term bond funds and moderate for intermediate-term bond funds, so investors should expect the Fund’s monthly income to fluctuate accordingly.

Income Fluctuations [Member]

Prospectus [Line Items]

Risk [Text Block]

• Income fluctuations. The Fund’s quarterly income distributions are likely to fluctuate considerably more than the income distributions of a typical bond fund. In fact, under certain conditions, the Fund may not have any income to distribute. Income fluctuations associated with changes in interest rates are expected to be low; however, income fluctuations associated with changes in inflation are expected to be high.

ETF exchange_volatility Risk [Member]

Prospectus [Line Items]

Risk [Text Block]

• The Fund’s ETF Shares are listed for trading on NYSE Arca and are bought and sold on the secondary market at market prices. Although it is expected that the market price of an ETF Share typically will approximate its net asset value (NAV), there may be times when the market price and the NAV differ significantly. Thus, you may pay more or less than NAV when you buy ETF Shares on the secondary market, and you may receive more or less than NAV when you sell those shares.

ETF_active trading_increased risk [Member]

Prospectus [Line Items]

Risk [Text Block]

• Although the Fund’s ETF Shares are listed for trading on NYSE Arca, it is possible that an active trading market may not be maintained.

ETF_trading halted risk [Member]

Prospectus [Line Items]

Risk [Text Block]

• Trading of the Fund’s ETF Shares may be halted by the activation of individual or marketwide trading halts (which halt trading for a specific period of time when the price of a particular security or overall market prices decline by a specified percentage). Trading of the Fund’s ETF Shares may also be halted if (1) the shares are delisted from NYSE Arca without first being listed on another exchange or (2) NYSE Arca officials determine that such action is appropriate in the interest of a fair and orderly market or for the protection of investors.

Risk Lose Money [Member]

Prospectus [Line Items]

Risk [Text Block]

An investment in the Fund could lose money over short or long periods of time.

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.