Label	Element	Value
Schwab Fundamental U.S. Small Company Index ETF
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	Schwab® Fundamental U.S. Small Company Index ETF
Objective [Heading]	rr_ObjectiveHeading	Investment Objective
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The fund’s goal is to track as closely as possible, before fees and expenses, the total return of the Russell RAFI™ US Small Company Index.
Expense [Heading]	rr_ExpenseHeading	Fund Fees and Expenses
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	This table describes 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 table and Example below.
Shareholder Fees Caption [Text]	rr_ShareholderFeesCaption	Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text]	rr_OperatingExpensesCaption	Annual Fund Operating Expenses (expenses that you pay each year as a % of the value of your investment)
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	Portfolio Turnover
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). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the example, affect the fund’s performance. During the most recent fiscal year, the fund’s portfolio turnover rate was 24% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	24.00%
Expense Example [Heading]	rr_ExpenseExampleHeading	Example
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	This example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then sell all of your shares at the end of those time periods. The example also assumes that your investment has a 5% return each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.
Expense Example by, Year, Caption [Text]	rr_ExpenseExampleByYearCaption	Expenses on a $10,000 Investment
Strategy [Heading]	rr_StrategyHeading	Principal Investment Strategies
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	To pursue its goal, the fund generally invests in stocks that are included in the Russell RAFI US Small Company Index†. The index selects, ranks, and weights securities by fundamental measures of company size – adjusted sales, retained operating cash flow, and dividends plus buybacks – rather than market capitalization. The index measures the performance of the small company size segment by fundamental overall company scores (scores), which are created using as the universe the U.S. companies in the FTSE Global Total Cap Index (the parent index). Securities are grouped in order of decreasing score and each company receives a weight based on its percentage of the total scores of the U.S. companies within the parent index. The index is comprised of the smallest U.S. companies by fundamental size. The bottom 12.5% of the companies by cumulative fundamental score are included in the index. The weights of the companies included in the index are determined annually and are implemented using a partial quarterly reconstitution methodology in which the index is split into four equal segments and each segment is rebalanced on a rolling quarterly basis. The index is compiled and calculated by Frank Russell Company in conjunction with Research Affiliates LLC, and the method of calculating the components of the index is subject to change. It is the fund’s policy that, under normal circumstances, it will invest at least 90% of its net assets (including, for this purpose, any borrowings for investment purposes) in stocks included in the index. The fund will notify its shareholders at least 60 days before changing this policy. The fund will generally seek to replicate the performance of the index by giving the same weight to a given stock as the index does. However, when the investment adviser believes it is in the best interest of the fund, such as to avoid purchasing odd-lots (i.e., purchasing less than the usual number of shares traded for a security), for tax considerations, or to address liquidity considerations with respect to a stock, the investment adviser may cause the fund’s weighting of a stock to be more or less than the index’s weighting of the stock. The fund may sell securities that are represented in the index in anticipation of their removal from the index, or buy securities that are not yet represented in the index in anticipation of their addition to the index. Under normal circumstances, the fund may invest up to 10% of its net assets in securities not included in the index. The principal types of these investments include those that the investment adviser believes will help the fund track the index, such as investments in † Index ownership – The Schwab Fundamental U.S. Small Company Index ETF is not in any way sponsored, endorsed, sold or promoted by Frank Russell Company (Russell), by the London Stock Exchange Group companies (LSEG), or by Research Affiliates LLC (RA) (collectively the Licensor Parties), and none of the Licensor Parties make any warranty or representation whatsoever, expressly or impliedly, either as to the results to be obtained from the use of the Russell RAFI US Small Company Index (the Index) or otherwise. The Index is compiled and calculated by Russell in conjunction with RA. None of the Licensor Parties shall be liable (whether in negligence or otherwise) to any person for any error in the Index and none of the Licensor Parties shall be under any obligation to advise any person of any error therein. “Russell®” is a trademark of Russell. The trade names “Research Affiliates®”, “Fundamental Index®” and “RAFI®” are registered trademarks of RA. Charles Schwab Investment Management, Inc. has obtained full license from Russell to use the Index. For full disclaimer please see the fund’s statement of additional information. (a) securities that are not represented in the index but the investment adviser anticipates will be added to the index or as necessary to reflect various corporate actions (such as mergers and spin-offs), (b) other investment companies, and (c) derivatives, principally futures contracts. The fund may use futures contracts and other derivatives primarily to seek returns on the fund’s otherwise uninvested cash assets to help it better track the index. The fund may also invest in cash and cash equivalents, including money market funds, and may lend its securities to minimize the difference in performance that naturally exists between an index fund and its corresponding index. The fund will concentrate its investments (i.e., hold more than 25% of its total assets) in a particular industry, group of industries or sector to approximately the same extent that the index is so concentrated. The investment adviser seeks to achieve, over time, a correlation between the fund’s performance and that of the index, before fees and expenses, of 95% or better. However, there can be no guarantee that the fund will achieve a high degree of correlation with the index. A number of factors may affect the fund’s ability to achieve a high correlation with the index, including the degree to which the fund utilizes a sampling technique (which involves investing in a limited number of index securities which, when taken together, are expected to perform similarly to the index as a whole). The correlation between the performance of the fund and the index may also diverge due to transaction costs, asset valuations, corporate actions (such as mergers and spin-offs), timing variances, and differences between the fund’s portfolio and the index resulting from legal restrictions (such as diversification requirements) that apply to the fund but not to the index.
Risk [Heading]	rr_RiskHeading	Principal Risks
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	Performance
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The bar chart below shows how the fund’s investment results have varied from year to year, and the following table shows how the fund’s average annual total returns for various periods compared to that of an index. This information provides some indication of the risks of investing in the fund. All figures assume distributions were reinvested. Keep in mind that future performance (both before and after taxes) may differ from past performance. For current performance information, please see www.schwabassetmanagement.com/schwabetfs_prospectus.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The bar chart below shows how the fund’s investment results have varied from year to year, and the following table shows how the fund’s average annual total returns for various periods compared to that of an index.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	www.schwabassetmanagement.com/schwabetfs_prospectus
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	Keep in mind that future performance (both before and after taxes) may differ from past performance.
Bar Chart [Heading]	rr_BarChartHeading	Annual Total Returns (%) as of 12/31
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Best Quarter: 30.46% Q4 2020 Worst Quarter: (35.49%) Q1 2020 Year-to-date performance (before taxes) as of 3/31/23: 4.51%
Year to Date Return, Label	rr_YearToDateReturnLabel	Year-to-date performance (before taxes)
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Mar. 31, 2023
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	4.51%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best Quarter:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Dec. 31, 2020
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	30.46%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst Quarter:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Mar. 31, 2020
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(35.49%)
Performance Table Heading	rr_PerformanceTableHeading	Average Annual Total Returns as of 12/31/22
Index No Deduction for Fees, Expenses, Taxes [Text]	rr_IndexNoDeductionForFeesExpensesTaxes	(reflects no deduction for expenses or taxes)
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	The after-tax figures reflect the highest individual federal income tax rates in effect during the period and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	Your actual after-tax returns depend on your individual tax situation. In addition, after-tax returns are not relevant if you hold your fund shares through a tax-deferred arrangement, such as a 401(k) plan, an individual retirement account (IRA) or other tax-advantaged account.
Performance Table Explanation after Tax Higher	rr_PerformanceTableExplanationAfterTaxHigher	In some cases, the return after taxes on distributions and sale of shares may exceed the fund’s other returns due to an assumed benefit from any losses on a sale of shares at the end of the measurement period.
Performance Table Closing [Text Block]	rr_PerformanceTableClosingTextBlock	The after-tax figures reflect the highest individual federal income tax rates in effect during the period and do not reflect the impact of state and local taxes. Your actual after-tax returns depend on your individual tax situation. In addition, after-tax returns are not relevant if you hold your fund shares through a tax-deferred arrangement, such as a 401(k) plan, an individual retirement account (IRA) or other tax-advantaged account. In some cases, the return after taxes on distributions and sale of shares may exceed the fund’s other returns due to an assumed benefit from any losses on a sale of shares at the end of the measurement period.
Schwab Fundamental U.S. Small Company Index ETF \| Risk Lose Money [Member]
Risk/Return:	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	The fund is subject to risks, any of which could cause an investor to lose money.
Schwab Fundamental U.S. Small Company Index ETF \| Market Risk [Member]
Risk/Return:	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Market Risk. Financial markets rise and fall in response to a variety of factors, sometimes rapidly and unpredictably. Markets may be impacted by economic, political, regulatory and other conditions, including economic sanctions and other government actions. In addition, the occurrence of global events, such as war, terrorism, environmental disasters, natural disasters and epidemics, may also negatively affect the financial markets. As with any investment whose performance is tied to these markets, the value of an investment in the fund will fluctuate, which means that an investor could lose money over short or long periods.
Schwab Fundamental U.S. Small Company Index ETF \| Investment Style Risk [Member]
Risk/Return:	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Investment Style Risk. The fund is an index fund. Therefore, the fund follows the securities included in the index during upturns as well as downturns. Because of its indexing strategy, the fund does not take steps to reduce market exposure or to lessen the effects of a declining market. In addition, because of the fund’s expenses, the fund’s performance may be below that of the index. Errors relating to the index may occur from time to time and may not be identified by the index provider for a period of time. In addition, market disruptions could cause delays in the index’s rebalancing schedule. Such errors and/or market disruptions may result in losses for the fund.
Schwab Fundamental U.S. Small Company Index ETF \| Equity Risk [Member]
Risk/Return:	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Equity Risk. The prices of equity securities rise and fall daily. These price movements may result from factors affecting individual companies, industries or the securities market as a whole. In addition, equity markets tend to move in cycles, which may cause stock prices to fall over short or extended periods of time.
Schwab Fundamental U.S. Small Company Index ETF \| Market Capitalization Risk [Member]
Risk/Return:	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Market Capitalization Risk. Securities issued by companies of different market capitalizations tend to go in and out of favor based on market and economic conditions. During a period when securities of a particular market capitalization fall behind other types of investments, the fund’s performance could be impacted.
Schwab Fundamental U.S. Small Company Index ETF \| Small-Cap Company Risk [Member]
Risk/Return:	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Small-Cap Company Risk. Securities issued by small-cap companies may be riskier than those issued by larger companies, and their prices may move sharply, especially during market upturns and downturns.
Schwab Fundamental U.S. Small Company Index ETF \| Tracking Error Risk [Member]
Risk/Return:	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Tracking Error Risk. As an index fund, the fund seeks to track the performance of the index, although it may not be successful in doing so. The divergence between the performance of the fund and the index, positive or negative, is called “tracking error.” Tracking error can be caused by many factors and it may be significant.
Schwab Fundamental U.S. Small Company Index ETF \| Derivatives Risk [Member]
Risk/Return:	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Derivatives Risk. The fund’s use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments. The fund’s use of derivatives could reduce the fund’s performance, increase its volatility and cause the fund to lose more than the initial amount invested. In addition, investments in derivatives may involve leverage, which means a small percentage of assets invested in derivatives can have a disproportionately large impact on the fund.
Schwab Fundamental U.S. Small Company Index ETF \| Liquidity Risk [Member]
Risk/Return:	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Liquidity Risk. The fund may be unable to sell certain securities, such as illiquid securities, readily at a favorable time or price, or the fund may have to sell them at a loss.
Schwab Fundamental U.S. Small Company Index ETF \| Securities Lending Risk [Member]
Risk/Return:	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Securities Lending Risk. Securities lending involves the risk of loss of rights in, or delay in recovery of, the loaned securities if the borrower fails to return the security loaned or becomes insolvent.
Schwab Fundamental U.S. Small Company Index ETF \| Concentration Risk [Member]
Risk/Return:	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Concentration Risk. To the extent that the fund’s or the index’s portfolio is concentrated in the securities of issuers in a particular market, industry, group of industries, sector or asset class, the fund may be adversely affected by the performance of those securities, may be subject to increased price volatility and may be more vulnerable to adverse economic, market, political or regulatory occurrences affecting that market, industry, group of industries, sector or asset class.
Schwab Fundamental U.S. Small Company Index ETF \| Market Trading Risk [Member]
Risk/Return:	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Market Trading Risk. Although fund shares are listed on national securities exchanges, there can be no assurance that an active trading market for fund shares will develop or be maintained. If an active market is not maintained, investors may find it difficult to buy or sell fund shares.
Schwab Fundamental U.S. Small Company Index ETF \| Shares of the Fund May Trade at Prices Other Than NAV [Member]
Risk/Return:	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Shares of the Fund May Trade at Prices Other Than NAV. Fund shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of the shares of the fund will approximate the fund’s net asset value (NAV), there may be times when the market price and the NAV vary significantly. An investor may pay more than NAV when buying shares of the fund in the secondary market, and an investor may receive less than NAV when selling those shares in the secondary market. The market price of fund shares may deviate, sometimes significantly, from NAV during periods of market volatility or market disruption.
Schwab Fundamental U.S. Small Company Index ETF \| Russell RAFI US Small Company Index
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	(14.58%)
5 Years	rr_AverageAnnualReturnYear05	5.96%
Since Inception	rr_AverageAnnualReturnSinceInception	8.63%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 15, 2013
Schwab Fundamental U.S. Small Company Index ETF \| Schwab Fundamental U.S. Small Company Index ETF
Risk/Return:	rr_RiskReturnAbstract
	rr_ShareholderFeeOther	none
Management fees	rr_ManagementFeesOverAssets	0.25%
Other expenses	rr_OtherExpensesOverAssets	none
Total annual fund operating expenses	rr_ExpensesOverAssets	0.25%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 26
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	80
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	141
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 318
Annual Return 2014	rr_AnnualReturn2014	7.79%
Annual Return 2015	rr_AnnualReturn2015	(5.05%)
Annual Return 2016	rr_AnnualReturn2016	23.49%
Annual Return 2017	rr_AnnualReturn2017	12.84%
Annual Return 2018	rr_AnnualReturn2018	(12.10%)
Annual Return 2019	rr_AnnualReturn2019	24.45%
Annual Return 2020	rr_AnnualReturn2020	8.40%
Annual Return 2021	rr_AnnualReturn2021	31.03%
Annual Return 2022	rr_AnnualReturn2022	(14.75%)
1 Year	rr_AverageAnnualReturnYear01	(14.75%)
5 Years	rr_AverageAnnualReturnYear05	5.78%
Since Inception	rr_AverageAnnualReturnSinceInception	8.39%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 15, 2013
Schwab Fundamental U.S. Small Company Index ETF \| Schwab Fundamental U.S. Small Company Index ETF \| After Taxes on Distributions
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	(15.05%)
5 Years	rr_AverageAnnualReturnYear05	5.38%
Since Inception	rr_AverageAnnualReturnSinceInception	7.99%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 15, 2013
Schwab Fundamental U.S. Small Company Index ETF \| Schwab Fundamental U.S. Small Company Index ETF \| After Taxes on Distributions and Sale of Fund Shares
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	(8.56%)
5 Years	rr_AverageAnnualReturnYear05	4.43%
Since Inception	rr_AverageAnnualReturnSinceInception	6.71%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 15, 2013

Label

Element

Value

Schwab Fundamental U.S. Small Company Index ETF

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Schwab® Fundamental U.S. Small Company Index ETF

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund’s goal is to track as closely as possible, before fees and expenses, the total return of the Russell RAFI™ US Small Company Index.

Expense [Heading]

rr_ExpenseHeading

Fund Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes 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 table and Example below.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a % of the value of your investment)

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

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). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the example, affect the fund’s performance. During the most recent fiscal year, the fund’s portfolio turnover rate was 24% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

24.00%

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then sell all of your shares at the end of those time periods. The example also assumes that your investment has a 5% return each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

Expenses on a $10,000 Investment

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

To pursue its goal, the fund generally invests in stocks that are included in the Russell RAFI US Small Company Index†. The index selects, ranks, and weights securities by fundamental measures of company size – adjusted sales, retained operating cash flow, and dividends plus buybacks – rather than market capitalization. The index measures the performance of the small company size segment by fundamental overall company scores (scores), which are created using as the universe the U.S. companies in the FTSE Global Total Cap Index (the parent index). Securities are grouped in order of decreasing score and each company receives a weight based on its percentage of the total scores of the U.S. companies within the parent index. The index is comprised of the smallest U.S. companies by fundamental size. The bottom 12.5% of the companies by cumulative fundamental score are included in the index. The weights of the companies included in the index are determined annually and are implemented using a partial quarterly reconstitution methodology in which the index is split into four equal segments and each segment is rebalanced on a rolling quarterly basis. The index is compiled and calculated by Frank Russell Company in conjunction with Research Affiliates LLC, and the method of calculating the components of the index is subject to change.

It is the fund’s policy that, under normal circumstances, it will invest at least 90% of its net assets (including, for this purpose, any borrowings for investment purposes) in stocks included in the index. The fund will notify its shareholders at least 60 days before changing this policy. The fund will generally seek to replicate the performance of the index by giving the same weight to a given stock as the index does. However, when the investment adviser believes it is in the best interest of the fund, such as to avoid purchasing odd-lots (i.e., purchasing less than the usual number of shares traded for a security), for tax considerations, or to address liquidity considerations with respect to a stock, the investment adviser may cause the fund’s weighting of a stock to be more or less than the index’s weighting of the stock. The fund may sell securities that are represented in the index in anticipation of their removal from the index, or buy securities that are not yet represented in the index in anticipation of their addition to the index.

Under normal circumstances, the fund may invest up to 10% of its net assets in securities not included in the index. The principal types of these investments include those that the investment adviser believes will help the fund track the index, such as investments in

†

Index ownership – The Schwab Fundamental U.S. Small Company Index ETF is not in any way sponsored, endorsed, sold or promoted by Frank Russell Company (Russell), by the London Stock Exchange Group companies (LSEG), or by Research Affiliates LLC (RA) (collectively the Licensor Parties), and none of the Licensor Parties make any warranty or representation whatsoever, expressly or impliedly, either as to the results to be obtained from the use of the Russell RAFI US Small Company Index (the Index) or otherwise. The Index is compiled and calculated by Russell in conjunction with RA. None of the Licensor Parties shall be liable (whether in negligence or otherwise) to any person for any error in the Index and none of the Licensor Parties shall be under any obligation to advise any person of any error therein. “Russell®” is a trademark of Russell. The trade names “Research Affiliates®”, “Fundamental Index®” and “RAFI®” are registered trademarks of RA. Charles Schwab Investment Management, Inc. has obtained full license from Russell to use the Index. For full disclaimer please see the fund’s statement of additional information.

(a) securities that are not represented in the index but the investment adviser anticipates will be added to the index or as necessary to reflect various corporate actions (such as mergers and spin-offs), (b) other investment companies, and (c) derivatives, principally futures contracts. The fund may use futures contracts and other derivatives primarily to seek returns on the fund’s otherwise uninvested cash assets to help it better track the index. The fund may also invest in cash and cash equivalents, including money market funds, and may lend its securities to minimize the difference in performance that naturally exists between an index fund and its corresponding index.

The fund will concentrate its investments (i.e., hold more than 25% of its total assets) in a particular industry, group of industries or sector to approximately the same extent that the index is so concentrated.

The investment adviser seeks to achieve, over time, a correlation between the fund’s performance and that of the index, before fees and expenses, of 95% or better. However, there can be no guarantee that the fund will achieve a high degree of correlation with the index. A number of factors may affect the fund’s ability to achieve a high correlation with the index, including the degree to which the fund utilizes a sampling technique (which involves investing in a limited number of index securities which, when taken together, are expected to perform similarly to the index as a whole). The correlation between the performance of the fund and the index may also diverge due to transaction costs, asset valuations, corporate actions (such as mergers and spin-offs), timing variances, and differences between the fund’s portfolio and the index resulting from legal restrictions (such as diversification requirements) that apply to the fund but not to the index.

Risk [Heading]

rr_RiskHeading

Principal Risks

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The bar chart below shows how the fund’s investment results have varied from year to year, and the following table shows how the fund’s average annual total returns for various periods compared to that of an index. This information provides some indication of the risks of investing in the fund. All figures assume distributions were reinvested. Keep in mind that future performance (both before and after taxes) may differ from past performance. For current performance information, please see
www.schwabassetmanagement.com/schwabetfs_prospectus.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.schwabassetmanagement.com/schwabetfs_prospectus

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

Keep in mind that future performance (both before and after taxes) may differ from past performance.

Bar Chart [Heading]

rr_BarChartHeading

Annual Total Returns (%) as of 12/31

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter: 30.46% Q4 2020

Worst Quarter: (35.49%) Q1 2020

Year-to-date performance (before taxes) as of 3/31/23: 4.51%

Year to Date Return, Label

rr_YearToDateReturnLabel

Year-to-date performance (before taxes)

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Mar. 31, 2023

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

4.51%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Dec. 31, 2020

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

30.46%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Mar. 31, 2020

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(35.49%)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns as of 12/31/22

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for expenses or taxes)

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

The after-tax figures reflect the highest individual federal income tax rates in effect during the period and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

Your actual after-tax returns depend on your individual tax situation. In addition, after-tax returns are not relevant if you hold your fund shares through a tax-deferred arrangement, such as a 401(k) plan, an individual retirement account (IRA) or other tax-advantaged account.

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

In some cases, the return after taxes on distributions and sale of shares may exceed the fund’s other returns due to an assumed benefit from any losses on a sale of shares at the end of the measurement period.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

The after-tax figures reflect the highest individual federal income tax rates in effect during the period and do not reflect the impact of state and local taxes. Your actual after-tax returns depend on your individual tax situation. In addition, after-tax returns are not relevant if you hold your fund shares through a tax-deferred arrangement, such as a 401(k) plan, an individual retirement account (IRA) or other tax-advantaged account. In some cases, the return

after taxes on distributions and sale of shares may exceed the fund’s other returns due to an assumed benefit from any losses on a sale of shares at the end of the measurement period.

Schwab Fundamental U.S. Small Company Index ETF | Risk Lose Money [Member]

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Risk [Text Block]

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The fund is subject to risks, any of which could cause an investor to lose money.

Schwab Fundamental U.S. Small Company Index ETF | Market Risk [Member]

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Risk [Text Block]

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Market Risk. Financial markets rise and fall in response to a variety of factors, sometimes rapidly and unpredictably. Markets may be impacted by economic, political, regulatory and other conditions, including economic sanctions and other government actions. In addition, the occurrence of global events, such as war, terrorism, environmental disasters, natural disasters and epidemics, may also negatively affect the financial markets. As with any investment whose performance is tied to these markets, the value of an investment in the fund will fluctuate, which means that an investor could lose money over short or long periods.

Schwab Fundamental U.S. Small Company Index ETF | Investment Style Risk [Member]

Risk/Return:

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Risk [Text Block]

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Investment Style Risk. The fund is an index fund. Therefore, the fund follows the securities included in the index during upturns as well as downturns. Because of its indexing strategy, the fund does not take steps to reduce market exposure or to lessen the effects of a declining market. In addition, because of the fund’s expenses, the fund’s performance may be below that of the index. Errors relating to the index may occur from time to time and may not be identified by the index provider for a period of time. In addition, market disruptions could cause delays in the index’s rebalancing schedule. Such errors and/or market disruptions may result in losses for the fund.

Schwab Fundamental U.S. Small Company Index ETF | Equity Risk [Member]

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Risk [Text Block]

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Equity Risk. The prices of equity securities rise and fall daily. These price movements may result from factors affecting individual companies, industries or the securities market as a whole. In addition, equity markets tend to move in cycles, which may cause stock prices to fall over short or extended periods of time.

Schwab Fundamental U.S. Small Company Index ETF | Market Capitalization Risk [Member]

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Market Capitalization Risk. Securities issued by companies of different market capitalizations tend to go in and out of favor based on market and economic conditions. During a period when securities of a particular market capitalization fall behind other types of investments, the fund’s performance could be impacted.

Schwab Fundamental U.S. Small Company Index ETF | Small-Cap Company Risk [Member]

Risk/Return:

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Risk [Text Block]

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Small-Cap Company Risk. Securities issued by small-cap companies may be riskier than those issued by larger companies, and their prices may move sharply, especially during market upturns and downturns.

Schwab Fundamental U.S. Small Company Index ETF | Tracking Error Risk [Member]

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Tracking Error Risk. As an index fund, the fund seeks to track the performance of the index, although it may not be successful in doing so. The divergence between the performance of the fund and the index, positive or negative, is called “tracking error.” Tracking error can be caused by many factors and it may be significant.

Schwab Fundamental U.S. Small Company Index ETF | Derivatives Risk [Member]

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Derivatives Risk. The fund’s use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments. The fund’s use of derivatives could reduce the fund’s performance, increase its volatility and cause the fund to lose more than the initial amount invested. In addition, investments in derivatives may involve leverage, which means a small percentage of assets invested in derivatives can have a disproportionately large impact on the fund.

Schwab Fundamental U.S. Small Company Index ETF | Liquidity Risk [Member]

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Liquidity Risk. The fund may be unable to sell certain securities, such as illiquid securities, readily at a favorable time or price, or the fund may have to sell them at a loss.

Schwab Fundamental U.S. Small Company Index ETF | Securities Lending Risk [Member]

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Securities Lending Risk. Securities lending involves the risk of loss of rights in, or delay in recovery of, the loaned securities if the borrower fails to return the security loaned or becomes insolvent.

Schwab Fundamental U.S. Small Company Index ETF | Concentration Risk [Member]

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Concentration Risk. To the extent that the fund’s or the index’s portfolio is concentrated in the securities of issuers in a particular market, industry, group of industries, sector or asset class, the fund may be adversely affected by the performance of those securities, may be subject to increased price volatility and may be more vulnerable to adverse economic, market, political or regulatory occurrences affecting that market, industry, group of industries, sector or asset class.

Schwab Fundamental U.S. Small Company Index ETF | Market Trading Risk [Member]

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Market Trading Risk. Although fund shares are listed on national securities exchanges, there can be no assurance that an active trading market for fund shares will develop or be maintained. If an active market is not maintained, investors may find it difficult to buy or sell fund shares.

Schwab Fundamental U.S. Small Company Index ETF | Shares of the Fund May Trade at Prices Other Than NAV [Member]

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Shares of the Fund May Trade at Prices Other Than NAV. Fund shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of the shares of the fund will approximate the fund’s net asset value (NAV), there may be times when the market price and the NAV vary significantly. An investor may pay more than NAV when buying shares of the fund in the secondary market, and an investor may receive less than NAV when selling those shares in the secondary market. The market price of fund shares may deviate, sometimes significantly, from NAV during periods of market volatility or market disruption.

Schwab Fundamental U.S. Small Company Index ETF | Russell RAFI US Small Company Index

Risk/Return:

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1 Year

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(14.58%)

5 Years

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5.96%

Since Inception

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8.63%