Label	Element	Value
Schwab Ariel Opportunities ETF
Prospectus [Line Items]	oef_ProspectusLineItems
Risk/Return [Heading]	oef_RiskReturnHeading	Schwab® Ariel Opportunities ETF
Objective [Heading]	oef_ObjectiveHeading	Investment Objective
Objective, Primary [Text Block]	oef_ObjectivePrimaryTextBlock	The fund seeks long-term capital appreciation.
Expense Heading [Optional Text]	oef_ExpenseHeading	Fund Fees and Expenses
Expense Narrative [Text Block]	oef_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 [Optional Text]	oef_ShareholderFeesCaption	Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Optional Text]	oef_OperatingExpensesCaption	Annual Fund Operating Expenses (expenses that you pay each year as a % of the value of your investment)
Expense Example [Heading]	oef_ExpenseExampleHeading	Example
Expense Example Narrative [Text Block]	oef_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]	oef_ExpenseExampleByYearCaption	Expenses on a $10,000 Investment
Portfolio Turnover [Heading]	oef_PortfolioTurnoverHeading	Portfolio Turnover
Portfolio Turnover [Text Block]	oef_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 15% of the average value of its portfolio.
Portfolio Turnover, Rate	oef_PortfolioTurnoverRate	15.00%
Strategy [Heading]	oef_StrategyHeading	Principal Investment Strategies
Strategy Narrative [Text Block]	oef_StrategyNarrativeTextBlock	The fund invests primarily in exchange-traded equity securities of U.S. small- and mid-capitalization companies which are companies with capitalizations within the range of the Russell 2500™ Index, as measured at the time of purchase; however, the fund may invest in exchange-traded securities of companies outside the stated range. In selecting securities, the fund’s subadviser seeks to invest in companies that it believes exhibit attributes that will result in capital appreciation including: high barriers to entry, enduring competitive advantage, predictable fundamentals that allow for the potential for double-digit earnings growth (at time of initial purchase), skilled management teams, and solid financials. In addition, the fund’s subadviser generally seeks to invest in companies that are trading at a low valuation relative to potential earnings and/or a low valuation relative to intrinsic value. In addition, during unusual economic or market conditions or for liquidity purposes, the fund may take temporary defensive positions, whether managed by the investment adviser or subadviser, that are inconsistent with the fund’s principal investment strategy. When the fund engages in such activities, it may not achieve its investment objective. The fund also may lend portfolio securities to earn additional income. Any income realized through securities lending may help fund performance. The fund is an actively managed, non-transparent exchange-traded fund (ETF) that does not seek to replicate the performance of a specified index. In lieu of publishing its portfolio contents (Actual Portfolio) daily, the fund publishes a proxy portfolio (Proxy Portfolio) each day on its website. The fund’s Proxy Portfolio is designed to closely track the daily performance of the fund but is not the fund’s Actual Portfolio. The fund will also publish certain related information about the Proxy Portfolio and the Actual Portfolio on its website daily. There is no minimum overlap required between the Actual Portfolio and the Proxy Portfolio.
Bar Chart and Performance Table [Heading]	oef_BarChartAndPerformanceTableHeading	Performance
Performance Narrative [Text Block]	oef_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 one or more indices. The S&P 500® Index serves as the fund’s regulatory index and provides a broad measure of market performance. The Russell 2500TM Index is the fund’s additional index and is more representative of the fund’s investment universe than the regulatory 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/prospectus.
Performance Information Illustrates Variability of Returns [Text]	oef_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 one or more indices.
Performance Additional Market Index [Text]	oef_PerformanceAdditionalMarketIndex	The Russell 2500TM Index is the fund’s additional index and is more representative of the fund’s investment universe than the regulatory index.
Performance Availability Website Address [Text]	oef_PerformanceAvailabilityWebSiteAddress	www.schwabassetmanagement.com/prospectus
Performance Past Does Not Indicate Future [Text]	oef_PerformancePastDoesNotIndicateFuture	Keep in mind that future performance (both before and after taxes) may differ from past performance.
Bar Chart [Heading]	oef_BarChartHeading	Annual Total Returns (%) as of 12/31
Bar Chart Closing [Text Block]	oef_BarChartClosingTextBlock	Best Quarter: 14.82% Q4 2023 Worst Quarter: (15.89%) Q2 2022 Year-to-date performance (before taxes) as of 6/30/25: (4.12%)
Year to Date Return, Label [Optional Text]	oef_YearToDateReturnLabel	Year-to-date performance (before taxes)
Bar Chart, Year to Date Return, Date	oef_BarChartYearToDateReturnDate	Jun. 30, 2025
Bar Chart, Year to Date Return	oef_BarChartYearToDateReturn	(4.12%)
Highest Quarterly Return, Label [Optional Text]	oef_HighestQuarterlyReturnLabel	Best Quarter
Highest Quarterly Return, Date	oef_BarChartHighestQuarterlyReturnDate	Dec. 31, 2023
Highest Quarterly Return	oef_BarChartHighestQuarterlyReturn	14.82%
Lowest Quarterly Return, Label [Optional Text]	oef_LowestQuarterlyReturnLabel	Worst Quarter
Lowest Quarterly Return, Date	oef_BarChartLowestQuarterlyReturnDate	Jun. 30, 2022
Lowest Quarterly Return	oef_BarChartLowestQuarterlyReturn	(15.89%)
Index No Deduction for Fees, Expenses, or Taxes [Text]	oef_IndexNoDeductionForFeesExpensesTaxes	(reflects no deduction for fees, expenses, or taxes)
Performance Table Uses Highest Federal Rate	oef_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	oef_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 Closing [Text Block]	oef_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.
Average Annual Return, Caption [Optional Text]	oef_AverageAnnualReturnCaption	Average Annual Total Returns as of 12/31/24
Schwab Ariel Opportunities ETF \| Risk Lose Money [Member]
Prospectus [Line Items]	oef_ProspectusLineItems
Risk [Text Block]	oef_RiskTextBlock	The fund is subject to risks, any of which could cause an investor to lose money.
Schwab Ariel Opportunities ETF \| Proxy Portfolio Risk [Member]
Prospectus [Line Items]	oef_ProspectusLineItems
Risk [Text Block]	oef_RiskTextBlock	Proxy Portfolio Risk. Unlike traditional ETFs that disclose their portfolio holdings on a daily basis, the fund does not disclose its holdings daily, rather it discloses a Proxy Portfolio. The goal of the Proxy Portfolio, during all market conditions, is to track closely the daily performance of the Actual Portfolio and minimize intra-day misalignment between the performance of the Proxy Portfolio and the performance of the Actual Portfolio. The Proxy Portfolio is designed to reflect the economic exposures and the risk characteristics of the Actual Portfolio on any given trading day. The Proxy Portfolio is intended to provide authorized participants and other market participants with enough information to support an effective arbitrage mechanism that keeps the market price of the fund at or close to the underlying net asset value (NAV) per share of the fund. The Proxy Portfolio methodology is novel and not yet proven as an effective arbitrage mechanism. The effectiveness of the Proxy Portfolio as an arbitrage mechanism is contingent upon, among other things, the fund’s factor model analysis creating a Proxy Portfolio that performs in a manner substantially identical to the performance of the Actual Portfolio and the willingness of authorized participants and other market participants to trade based on a Proxy Portfolio. There is no guarantee that this arbitrage mechanism will operate as intended. Further, while the Proxy Portfolio may include some of the fund’s holdings, it is not the fund’s Actual Portfolio. ETFs trading on the basis of a published Proxy Portfolio may exhibit wider premiums and discounts, bid/ask spreads, and tracking error than other ETFs using the same investment strategies that publish their portfolios on a daily basis, especially during periods of market disruption or volatility. Therefore, shares of the fund may cost investors more to trade than shares of a traditional ETF. • Each day the fund calculates the overlap between the holdings of the prior Business Day’s Proxy Portfolio compared to the Actual Portfolio (Proxy Overlap) and the difference, in percentage terms, between the Proxy Portfolio per share NAV and that of the Actual Portfolio (Tracking Error). If the Tracking Error becomes large, there is a risk that the performance of the Proxy Portfolio may deviate from the performance of the Actual Portfolio. • The fund’s Board of Trustees (the Board) monitors its Tracking Error, bid/ask spread and premiums/discounts. If deviations become too large, the Board will consider the continuing viability of the fund, whether shareholders are being harmed, and what, if any, corrective measures would be appropriate. See the Statement of Additional Information for further discussion of the Board’s monitoring responsibilities. • Although the fund seeks to benefit from keeping its portfolio information secret, market participants may attempt to use the Proxy Portfolio to identify a fund’s trading strategy, which if successful, could result in such market participants engaging in certain predatory trading practices that may have the potential to harm the fund and its shareholders. The Proxy Portfolio and any related disclosures have been designed to minimize the risk of predatory trading practices, but they may not be successful in doing so.
Schwab Ariel Opportunities ETF \| Premium/Discount Risk [Member]
Prospectus [Line Items]	oef_ProspectusLineItems
Risk [Text Block]	oef_RiskTextBlock	Premium/Discount Risk. Publication of the Proxy Portfolio is not the same level of transparency as the publication of the Actual Portfolio by a fully transparent ETF. Although the Proxy Portfolio is intended to provide authorized participants and other market participants with enough information to allow for an effective arbitrage mechanism that is intended to keep the market price of the fund at or close to the underlying NAV per share of the fund, there is a risk (which may increase during periods of market disruption or volatility) that market prices will vary significantly from NAV per share of the fund. This means the price paid to buy shares on an exchange may not match the value of the fund’s portfolio. The same is true when shares are sold.
Schwab Ariel Opportunities ETF \| Trading Halt Risk [Member]
Prospectus [Line Items]	oef_ProspectusLineItems
Risk [Text Block]	oef_RiskTextBlock	Trading Halt Risk. If securities representing 10% or more of the fund’s Actual Portfolio do not have readily available market quotations, the fund will promptly request that the listing exchange halt trading in the fund’s shares which means that investors would not be able to trade their shares. Trading halts may have a greater impact on the fund compared to other ETFs due to the fund’s non-transparent structure. If the trading of a security held in the fund’s Actual Portfolio is halted, or otherwise does not have readily available market quotations, and the investment adviser believes that the lack of any such readily available market quotations may affect the reliability of the Proxy Portfolio as an arbitrage vehicle, or otherwise determines it is in the best interest of the fund, the investment adviser will promptly disclose on the fund’s website the identity and weighting of such security for so long as such security’s trading is halted or otherwise does not have readily available market quotations and remains in the Actual Portfolio.
Schwab Ariel Opportunities ETF \| Authorized Participant Concentration Risk [Member]
Prospectus [Line Items]	oef_ProspectusLineItems
Risk [Text Block]	oef_RiskTextBlock	Authorized Participant Concentration Risk. Only an authorized participant may engage in creation or redemption transactions directly with the fund. The fund may have a limited number of institutions that act as authorized participants, none of which are obligated to engage in creation and/or redemption transactions. To the extent that these institutions exit the business or are unable to proceed with creation and/or redemption orders with respect to the fund and no other authorized participant is able to step forward to process creation and/or redemption orders, fund shares may trade at a discount to NAV and possibly face trading halts and/or delisting. This risk may be more pronounced during periods of market volatility or market disruptions. The fact that the fund is offering a novel and unique structure may affect the number of entities willing to act as authorized participants.
Schwab Ariel Opportunities ETF \| Tracking Error Risk [Member]
Prospectus [Line Items]	oef_ProspectusLineItems
Risk [Text Block]	oef_RiskTextBlock	Tracking Error Risk. Although the Proxy Portfolio is designed to reflect the economic exposure and risk characteristics of the fund’s Actual Portfolio on any given trading day, there is a risk that the performance of the Proxy Portfolio will diverge from the performance of the Actual Portfolio, potentially materially.
Schwab Ariel Opportunities ETF \| Equity Risk [Member]
Prospectus [Line Items]	oef_ProspectusLineItems
Risk [Text Block]	oef_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 Ariel Opportunities ETF \| Market Capitalization Risk [Member]
Prospectus [Line Items]	oef_ProspectusLineItems
Risk [Text Block]	oef_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 Ariel Opportunities ETF \| Small-Cap Company Risk [Member]
Prospectus [Line Items]	oef_ProspectusLineItems
Risk [Text Block]	oef_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 Ariel Opportunities ETF \| Mid-Cap Company Risk [Member]
Prospectus [Line Items]	oef_ProspectusLineItems
Risk [Text Block]	oef_RiskTextBlock	Mid-Cap Company Risk. Mid-cap companies may be more vulnerable to adverse business or economic events than larger, more established companies and the value of securities issued by these companies may move sharply.
Schwab Ariel Opportunities ETF \| Management Risk [Member]
Prospectus [Line Items]	oef_ProspectusLineItems
Risk [Text Block]	oef_RiskTextBlock	Management Risk. As with all actively managed funds, the fund is subject to the risk that its investment adviser and/or subadviser will select investments or allocate assets in a manner that could cause the fund to underperform or otherwise not meet its investment objective. The fund’s investment adviser and/or subadviser applies its own investment techniques and risk analyses in making investment decisions for the fund, but there can be no guarantee that they will produce the desired results.
Schwab Ariel Opportunities ETF \| Value Investing Risk [Member]
Prospectus [Line Items]	oef_ProspectusLineItems
Risk [Text Block]	oef_RiskTextBlock	Value Investing Risk. Value investing attempts to identify undervalued companies with characteristics for improved valuations. Securities that exhibit value characteristics tend to perform differently and shift in and out of favor with investors depending on changes in market and economic conditions. As a result, the fund’s performance may at times fall behind the performance of other funds that invest more broadly or in securities that exhibit different characteristics.
Schwab Ariel Opportunities ETF \| Market Risk [Member]
Prospectus [Line Items]	oef_ProspectusLineItems
Risk [Text Block]	oef_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, tariffs 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 Ariel Opportunities ETF \| Liquidity Risk [Member]
Prospectus [Line Items]	oef_ProspectusLineItems
Risk [Text Block]	oef_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 Ariel Opportunities ETF \| Securities Lending Risk [Member]
Prospectus [Line Items]	oef_ProspectusLineItems
Risk [Text Block]	oef_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 Ariel Opportunities ETF \| Market Trading Risk [Member]
Prospectus [Line Items]	oef_ProspectusLineItems
Risk [Text Block]	oef_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 Ariel Opportunities ETF \| Shares of the Fund May Trade at Prices Other Than NAV [Member]
Prospectus [Line Items]	oef_ProspectusLineItems
Risk [Text Block]	oef_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 NAV, there may be times when the market price and the NAV vary significantly. In addition, due to the fund’s novel and unique structure, shares of the fund may trade at a larger premium or discount to the NAV of shares of traditional ETFs that disclose their portfolio holdings daily. As a result, 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 disruptions or volatility.
Schwab Ariel Opportunities ETF \| Schwab Ariel Opportunities ETF
Prospectus [Line Items]	oef_ProspectusLineItems
Shareholder Fee, Other	oef_ShareholderFeeOther	$ 0
Management Fees (as a percentage of Assets)	oef_ManagementFeesOverAssets	0.59%
Other Expenses (as a percentage of Assets):	oef_OtherExpensesOverAssets	0.00%
Expenses (as a percentage of Assets)	oef_ExpensesOverAssets	0.59%
Expense Example, with Redemption, 1 Year	oef_ExpenseExampleYear01	$ 60
Expense Example, with Redemption, 3 Years	oef_ExpenseExampleYear03	189
Expense Example, with Redemption, 5 Years	oef_ExpenseExampleYear05	329
Expense Example, with Redemption, 10 Years	oef_ExpenseExampleYear10	$ 738
Russell 2500™ Index
Prospectus [Line Items]	oef_ProspectusLineItems
Average Annual Return, Percent	oef_AvgAnnlRtrPct	12.00%
Average Annual Return, Percent	oef_AvgAnnlRtrPct	0.85%
S&P 500® Index
Prospectus [Line Items]	oef_ProspectusLineItems
Average Annual Return, Percent	oef_AvgAnnlRtrPct	25.02%
Average Annual Return, Percent	oef_AvgAnnlRtrPct	9.24%
Schwab Ariel Opportunities ETF
Prospectus [Line Items]	oef_ProspectusLineItems
Annual Return [Percent]	oef_AnnlRtrPct	(18.01%)
Annual Return [Percent]	oef_AnnlRtrPct	17.88%
Annual Return [Percent]	oef_AnnlRtrPct	16.03%
Average Annual Return, Percent	oef_AvgAnnlRtrPct	16.03%
Average Annual Return, Percent	oef_AvgAnnlRtrPct	3.00%
Performance Inception Date	oef_PerfInceptionDate	Nov. 16, 2021
Schwab Ariel Opportunities ETF \| After Taxes on Distributions
Prospectus [Line Items]	oef_ProspectusLineItems
Average Annual Return, Percent	oef_AvgAnnlRtrPct	15.89%
Average Annual Return, Percent	oef_AvgAnnlRtrPct	2.86%
Schwab Ariel Opportunities ETF \| After Taxes on Distributions and Sales
Prospectus [Line Items]	oef_ProspectusLineItems
Average Annual Return, Percent	oef_AvgAnnlRtrPct	9.57%
Average Annual Return, Percent	oef_AvgAnnlRtrPct	2.28%

Label

Element

Value

Prospectus [Line Items]

oef_ProspectusLineItems

Risk/Return [Heading]

oef_RiskReturnHeading

Schwab® Ariel Opportunities ETF

Objective [Heading]

oef_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

oef_ObjectivePrimaryTextBlock

The fund seeks long-term capital appreciation.

Expense Heading [Optional Text]

oef_ExpenseHeading

Fund Fees and Expenses

Expense Narrative [Text Block]

oef_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 [Optional Text]

oef_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Optional Text]

oef_OperatingExpensesCaption

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

Expense Example [Heading]

oef_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

oef_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]

oef_ExpenseExampleByYearCaption

Expenses on a $10,000 Investment

Portfolio Turnover [Heading]

oef_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover [Text Block]

oef_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 15% of the average value of its portfolio.

Portfolio Turnover, Rate

oef_PortfolioTurnoverRate

15.00%

Strategy [Heading]

oef_StrategyHeading

Principal Investment Strategies

Strategy Narrative [Text Block]

oef_StrategyNarrativeTextBlock

The fund invests primarily in exchange-traded equity securities of U.S. small- and mid-capitalization companies which are companies with capitalizations within the range of the Russell 2500™ Index, as measured at the time of purchase; however, the fund may invest in exchange-traded securities of companies outside the stated range.

In selecting securities, the fund’s subadviser seeks to invest in companies that it believes exhibit attributes that will result in capital appreciation including: high barriers to entry, enduring competitive advantage, predictable fundamentals that allow for the potential for double-digit earnings growth (at time of initial purchase), skilled management teams, and solid financials. In addition, the fund’s subadviser generally seeks to invest in companies that are trading at a low valuation relative to potential earnings and/or a low valuation relative to intrinsic value.

In addition, during unusual economic or market conditions or for liquidity purposes, the fund may take temporary defensive positions, whether managed by the investment adviser or subadviser, that are inconsistent with the fund’s principal investment strategy. When the fund engages in such activities, it may not achieve its investment objective.

The fund also may lend portfolio securities to earn additional income. Any income realized through securities lending may help fund performance.

The fund is an actively managed, non-transparent exchange-traded fund (ETF) that does not seek to replicate the performance of a specified index. In lieu of publishing its portfolio contents (Actual Portfolio) daily, the fund publishes a proxy portfolio (Proxy Portfolio) each day on its website. The fund’s Proxy Portfolio is designed to closely track the daily performance of the fund but is not the fund’s Actual Portfolio. The fund will also publish certain related information about the Proxy Portfolio and the Actual Portfolio on its website daily. There is no minimum overlap required between the Actual Portfolio and the Proxy Portfolio.

Bar Chart and Performance Table [Heading]

oef_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

oef_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 one or more indices. The S&P 500® Index serves as the fund’s regulatory index and provides a broad measure of market performance. The Russell 2500TM Index is the fund’s additional index and is more representative of the fund’s investment universe than the regulatory 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/prospectus.

Performance Information Illustrates Variability of Returns [Text]

oef_PerformanceInformationIllustratesVariabilityOfReturns

Performance Additional Market Index [Text]

oef_PerformanceAdditionalMarketIndex

The Russell 2500TM Index is the fund’s additional index and is more representative of the fund’s investment universe than the regulatory index.

Performance Availability Website Address [Text]

oef_PerformanceAvailabilityWebSiteAddress

www.schwabassetmanagement.com/prospectus

Performance Past Does Not Indicate Future [Text]

oef_PerformancePastDoesNotIndicateFuture

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

Bar Chart [Heading]

oef_BarChartHeading

Annual Total Returns (%) as of 12/31

Bar Chart Closing [Text Block]

oef_BarChartClosingTextBlock

Best Quarter: 14.82% Q4 2023

Worst Quarter: (15.89%) Q2 2022

Year-to-date performance (before taxes) as of 6/30/25: (4.12%)

Year to Date Return, Label [Optional Text]

oef_YearToDateReturnLabel

Year-to-date performance (before taxes)

Bar Chart, Year to Date Return, Date

oef_BarChartYearToDateReturnDate

Jun. 30, 2025

Bar Chart, Year to Date Return

oef_BarChartYearToDateReturn

(4.12%)

Highest Quarterly Return, Label [Optional Text]

oef_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

oef_BarChartHighestQuarterlyReturnDate

Dec. 31, 2023

Highest Quarterly Return

oef_BarChartHighestQuarterlyReturn

14.82%

Lowest Quarterly Return, Label [Optional Text]

oef_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

oef_BarChartLowestQuarterlyReturnDate

Jun. 30, 2022

Lowest Quarterly Return

oef_BarChartLowestQuarterlyReturn

(15.89%)

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

oef_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses, or taxes)

Performance Table Uses Highest Federal Rate

oef_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

oef_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 Closing [Text Block]

oef_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.

Average Annual Return, Caption [Optional Text]

oef_AverageAnnualReturnCaption

Average Annual Total Returns as of 12/31/24

Schwab Ariel Opportunities ETF | Risk Lose Money [Member]

Prospectus [Line Items]

oef_ProspectusLineItems

Risk [Text Block]

oef_RiskTextBlock

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

Schwab Ariel Opportunities ETF | Proxy Portfolio Risk [Member]

Prospectus [Line Items]

oef_ProspectusLineItems

Risk [Text Block]

oef_RiskTextBlock

Proxy Portfolio Risk. Unlike traditional ETFs that disclose their portfolio holdings on a daily basis, the fund does not disclose its holdings daily, rather it discloses a Proxy Portfolio. The goal of the Proxy Portfolio, during all market conditions, is to track closely the daily performance of the Actual Portfolio and minimize intra-day misalignment between the performance of the Proxy Portfolio and the performance of the Actual Portfolio. The Proxy Portfolio is designed to reflect the economic exposures and the risk characteristics of the Actual Portfolio on any given trading day.

The Proxy Portfolio is intended to provide authorized participants and other market participants with enough information to support an effective arbitrage mechanism that keeps the market price of the fund at or close to the underlying net asset value (NAV) per share of the fund. The Proxy Portfolio methodology is novel and not yet proven as an effective arbitrage mechanism. The effectiveness of

the Proxy Portfolio as an arbitrage mechanism is contingent upon, among other things, the fund’s factor model analysis creating a Proxy Portfolio that performs in a manner substantially identical to the performance of the Actual Portfolio and the willingness of authorized participants and other market participants to trade based on a Proxy Portfolio. There is no guarantee that this arbitrage mechanism will operate as intended. Further, while the Proxy Portfolio may include some of the fund’s holdings, it is not the fund’s Actual Portfolio. ETFs trading on the basis of a published Proxy Portfolio may exhibit wider premiums and discounts, bid/ask spreads, and tracking error than other ETFs using the same investment strategies that publish their portfolios on a daily basis, especially during periods of market disruption or volatility. Therefore, shares of the fund may cost investors more to trade than shares of a traditional ETF.

•

Each day the fund calculates the overlap between the holdings of the prior Business Day’s Proxy Portfolio compared to the Actual Portfolio (Proxy Overlap) and the difference, in percentage terms, between the Proxy Portfolio per share NAV and that of the Actual Portfolio (Tracking Error). If the Tracking Error becomes large, there is a risk that the performance of the Proxy Portfolio may deviate from the performance of the Actual Portfolio.

•

The fund’s Board of Trustees (the Board) monitors its Tracking Error, bid/ask spread and premiums/discounts. If deviations become too large, the Board will consider the continuing viability of the fund, whether shareholders are being harmed, and what, if any, corrective measures would be appropriate. See the Statement of Additional Information for further discussion of the Board’s monitoring responsibilities.

•

Although the fund seeks to benefit from keeping its portfolio information secret, market participants may attempt to use the Proxy Portfolio to identify a fund’s trading strategy, which if successful, could result in such market participants engaging in certain predatory trading practices that may have the potential to harm the fund and its shareholders. The Proxy Portfolio and any related disclosures have been designed to minimize the risk of predatory trading practices, but they may not be successful in doing so.

Schwab Ariel Opportunities ETF | Premium/Discount Risk [Member]

Prospectus [Line Items]

oef_ProspectusLineItems

Risk [Text Block]

oef_RiskTextBlock

Premium/Discount Risk. Publication of the Proxy Portfolio is not the same level of transparency as the publication of the Actual Portfolio by a fully transparent ETF. Although the Proxy Portfolio is intended to provide authorized participants and other market participants with enough information to allow for an effective arbitrage mechanism that is intended to keep the market price of the fund at or close to the underlying NAV per share of the fund, there is a risk (which may increase during periods of market disruption or volatility) that market prices will vary significantly from NAV per share of the fund. This means the price paid to buy shares on an exchange may not match the value of the fund’s portfolio. The same is true when shares are sold.

Schwab Ariel Opportunities ETF | Trading Halt Risk [Member]

Prospectus [Line Items]

oef_ProspectusLineItems

Risk [Text Block]

oef_RiskTextBlock

Trading Halt Risk. If securities representing 10% or more of the fund’s Actual Portfolio do not have readily available market quotations, the fund will promptly request that the listing exchange halt trading in the fund’s shares which means that investors would not be able to trade their shares. Trading halts may have a greater impact on the fund compared to other ETFs due to the fund’s

non-transparent structure. If the trading of a security held in the fund’s Actual Portfolio is halted, or otherwise does not have readily available market quotations, and the investment adviser believes that the lack of any such readily available market quotations may affect the reliability of the Proxy Portfolio as an arbitrage vehicle, or otherwise determines it is in the best interest of the fund, the investment adviser will promptly disclose on the fund’s website the identity and weighting of such security for so long as such security’s trading is halted or otherwise does not have readily available market quotations and remains in the Actual Portfolio.

Schwab Ariel Opportunities ETF | Authorized Participant Concentration Risk [Member]

Prospectus [Line Items]

oef_ProspectusLineItems

Risk [Text Block]

oef_RiskTextBlock

Authorized Participant Concentration Risk. Only an authorized participant may engage in creation or redemption transactions directly with the fund. The fund may have a limited number of institutions that act as authorized participants, none of which are obligated to engage in creation and/or redemption transactions. To the extent that these institutions exit the business or are unable to proceed with creation and/or redemption orders with respect to the fund and no other authorized participant is able to step forward to process creation and/or redemption orders, fund shares may trade at a discount to NAV and possibly face trading halts and/or delisting. This risk may be more pronounced during periods of market volatility or market disruptions. The fact that the fund is offering a novel and unique structure may affect the number of entities willing to act as authorized participants.

Schwab Ariel Opportunities ETF | Tracking Error Risk [Member]

Prospectus [Line Items]

oef_ProspectusLineItems

Risk [Text Block]

oef_RiskTextBlock

Tracking Error Risk. Although the Proxy Portfolio is designed to reflect the economic exposure and risk characteristics of the fund’s Actual Portfolio on any given trading day, there is a risk that the performance of the Proxy Portfolio will diverge from the performance of the Actual Portfolio, potentially materially.

Schwab Ariel Opportunities ETF | Equity Risk [Member]

Prospectus [Line Items]

oef_ProspectusLineItems

Risk [Text Block]

oef_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 Ariel Opportunities ETF | Market Capitalization Risk [Member]

Prospectus [Line Items]

oef_ProspectusLineItems

Risk [Text Block]

oef_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 Ariel Opportunities ETF | Small-Cap Company Risk [Member]

Prospectus [Line Items]

oef_ProspectusLineItems

Risk [Text Block]

oef_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 Ariel Opportunities ETF | Mid-Cap Company Risk [Member]

Prospectus [Line Items]

oef_ProspectusLineItems

Risk [Text Block]

oef_RiskTextBlock

Mid-Cap Company Risk. Mid-cap companies may be more vulnerable to adverse business or economic events than larger, more established companies and the value of securities issued by these companies may move sharply.

Schwab Ariel Opportunities ETF | Management Risk [Member]

Prospectus [Line Items]

oef_ProspectusLineItems

Risk [Text Block]

oef_RiskTextBlock

Management Risk. As with all actively managed funds, the fund is subject to the risk that its investment adviser and/or subadviser will select investments or allocate assets in a manner that could cause the fund to underperform or otherwise not meet its investment

objective. The fund’s investment adviser and/or subadviser applies its own investment techniques and risk analyses in making investment decisions for the fund, but there can be no guarantee that they will produce the desired results.

Schwab Ariel Opportunities ETF | Value Investing Risk [Member]

Prospectus [Line Items]

oef_ProspectusLineItems

Risk [Text Block]

oef_RiskTextBlock

Value Investing Risk. Value investing attempts to identify undervalued companies with characteristics for improved valuations. Securities that exhibit value characteristics tend to perform differently and shift in and out of favor with investors depending on changes in market and economic conditions. As a result, the fund’s performance may at times fall behind the performance of other funds that invest more broadly or in securities that exhibit different characteristics.

Schwab Ariel Opportunities ETF | Market Risk [Member]

Prospectus [Line Items]

oef_ProspectusLineItems

Risk [Text Block]

oef_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, tariffs 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 Ariel Opportunities ETF | Liquidity Risk [Member]

Prospectus [Line Items]

oef_ProspectusLineItems

Risk [Text Block]

oef_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 Ariel Opportunities ETF | Securities Lending Risk [Member]

Prospectus [Line Items]

oef_ProspectusLineItems

Risk [Text Block]

oef_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 Ariel Opportunities ETF | Market Trading Risk [Member]

Prospectus [Line Items]

oef_ProspectusLineItems

Risk [Text Block]

oef_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 Ariel Opportunities ETF | Shares of the Fund May Trade at Prices Other Than NAV [Member]

Prospectus [Line Items]

oef_ProspectusLineItems

Risk [Text Block]

oef_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 NAV, there may be times when the market price and the NAV vary significantly. In addition, due to the fund’s novel and unique structure, shares of the fund may trade at a larger premium or discount to the NAV of shares of traditional ETFs that disclose their portfolio holdings daily. As a result, 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 disruptions or volatility.

Schwab Ariel Opportunities ETF | Schwab Ariel Opportunities ETF

Prospectus [Line Items]

oef_ProspectusLineItems

Shareholder Fee, Other

oef_ShareholderFeeOther

$ 0

Management Fees (as a percentage of Assets)

oef_ManagementFeesOverAssets

0.59%

Other Expenses (as a percentage of Assets):

oef_OtherExpensesOverAssets

0.00%